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花园 (4)
动态 (4985)
Miss Chen
2017年08月05日
Miss Chen

Description: This perennial plant is 2-3½' tall, branching occasionally near the apex. The four-angled stems are light green and glabrous to finely pubescent. The opposite leaves are up to 4" long and 2" across, and they have short petioles. The leaves are cordate to broadly lanceolate in shape and their margins are crenate to crenate-serrate. The upper surface of the leaves is conspicuously veined and dull green, while the lower surface is white and finely canescent. The foliage has an anise scent. The upper stems terminate in spikes of flowers about 3-6" long. The small flowers are arranged in dense whorls that are crowded along the spike, although sometimes the whorls are less crowded and more interrupted. The calyx of a flower is tubular and has five teeth; it is usually dull blue-violet or a similar color, becoming more colorful toward its tips. The tubular flowers are about 1/3" (8 mm.) long, extending beyond the calyx. They are blue-violet. The corolla of a flower is divided into a short upper lip and a longer lower lip. The lower lip has 2 small lateral lobes and a larger central lobe. Exerted from the throat of the flower are 4 stamens with blue-violet anthers, and a style that is cleft toward its tip. The flowers bloom in scattered locations along the spikes for about 1-2 months from mid- to late summer. During this time, calyx of each flower remains somewhat colorful. There is no floral scent. The flowers are replaced by nutlets that are oval-shaped and smooth. The root system produces a taproot. Cultivation: The preference is full or partial sun, and mesic to dry conditions. The soil can consist of loam, clay-loam, or contain some rocky material. Foliar disease isn't a significant problem, although some of the lower leaves may drop from the central stem in response to a drought. Occasionally, slugs and insects will feed on the leaves, creating holes. This member of the Mint family is more resistant to drought than many others. Range & Habitat: In the wild, Anise Hyssop is rare in Illinois; it is known to occur in only Menard county in central Illinois (see Distribution Map). This species is more common in areas that lie northwest of Illinois. Typical habitats include openings in dry upland forests, upland areas of prairies, scrubby barrens, and thickets. Cultivated forms of Anise Hyssop are often grown in flower gardens; these cultivars are often hybrids and vary in their fidelity to the wild forms of this plant. In Menard county, the population of plants was likely introduced. Other populations in the wild, if they exist, are likely to be plants that have escaped cultivation. Faunal Associations: The flowers are cross-pollinated primarily by honeybees, bumblebees, digger bees (Melissodes spp.), leaf-cutting bees (Megachile spp.), Halictid bees (Lasioglossum spp., etc.), and Masked bees (Hylaeus spp.), which seek nectar or pollen. The flowers are also visited by an oligolectic bee, Dufourea monardae, which has extended its range into Illinois. Other occasional floral visitors are Syrphid flies, bee flies, and various butterflies, skippers, and moths. Mammalian herbivores normally avoid consumption of this plant as the anise scent of the foliage is repugnant to them. The anise scent may also deter some leaf-chewing insect species. Photographic Location: The photographs were taken of plants growing in the wildflower garden of the webmaster in Urbana, Illinois. Comments: Because of its rarity, Anise Hyssop is not normally thought of as a prairie species in Illinois, nor does it appear in many field guides of prairie plants for the tallgrass prairie. This plant does occur in the northwestern area of the tallgrass prairie, however, with a few scattered remnant populations elsewhere. Other members of this genus are woodland species. One of them, Agastache scrophulariaefolia (Purple Giant Hyssop), has flowers with similar coloration to Anise Hyssop. However, the foliage of Purple Giant Hyssop doesn't have an anise scent and the the undersides of its leaves are green, rather than white. Purple Giant Hyssop is more pubescent or hairier than Anise Hyssop, and it tends to be a taller plant. The calyx of each flower remains green for this species, unlike Anise Hyssop, where each calyx assumes a coloration that is more similar to the flowers. This latter characteristic can cause Anise Hyssop to look like it is in flower, even when it is not.
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Miss Chen
2017年08月05日
Miss Chen

Description: This plant is a summer annual about 1-2' tall that usually branches abundantly. It is more or less erect. The slender stems are rather angular with flat ridges, green to reddish purple, and hairless to mostly hairless. The opposite leaves are up to 3" long and 1/8" (3 mm.) across; they are green to purplish/reddish green, linear, glabrous, and sessile. Individual flowers and their buds are produced from the axils of the leaves on the upper and outer stems; these flowering stems can be regarded as leafy racemes. The swollen flower buds are conspicuously white. Each flower is about ½–¾" across, consisting of a short tubular corolla with 5 petal-like lobes and a tubular calyx with 5 short teeth. The corolla is pink, purplish pink, or medium purple; its 5 rounded lobes are quite large in relation to its tubular base. The lobes are finely ciliate along their margins. The lower interior of the corolla has dark purple spots and a pair of faint yellow lines. Near the upper interior of the corolla, there are 4 stamens with hairy white anthers and an undivided white style (sometimes with a pale yellow tip). The slender pedicels of the flowers are green to reddish purple; they are usually as long or longer than the flowers (at least ½" long). The blooming period occurs during the late summer or early fall and lasts about 2-3 weeks. Each flower lasts only a day or two before its corolla falls to the ground. There is no noticeable floral scent. Each flower is replaced by a globoid seed capsule containing many small seeds that can be blown about by the wind. The root system is fibrous. Slender False Foxglove is partially parasitic on other plants. Cultivation: The preference is full or partial sun, moist to slightly dry conditions, and a rather loose, friable soil containing silt or sand that is slightly to moderately acidic. This species also adapts to thin rocky soil. Its growth is more robust when a suitable host plant is present nearby. Range & Habitat: Slender False Foxglove is occasional throughout Illinois, where it is native. Habitats include moist to mesic prairies, sand prairies, savannas, sandy savannas, woodland borders, sandstone glades, thickets, low sand flats, silty or sandy roadside ditches, and edges of fields. This species tends to occur in slightly disturbed habitats with infertile soil and sparse ground vegetation. It has low fidelity to any particular habitat. Faunal Associations: The nectar of the flowers attracts long-tongued bees (bumblebees, honeybees, and Large Leaf-Cutting bees), Panurgine bees (Calliopsis andreniformis & others), and butterflies. Some Halictid bees collect pollen, while Syrphid flies occasionally feed on the pollen. Large Leaf-Cutting bees (Megachile spp.) sometimes cut the petals (lobes) of the flowers for nesting material. Among these various insects, the long-tongued bees and Panurgine bees are more effective at cross-pollination of the flowers (see Robertson, 1929). The caterpillars of the butterfly Junonia coenia (Buckeye) feed on the foliage. Mammalian herbivores may browse on the foliage of Slender False Foxglove, although it is reportedly toxic to sheep. Photographic Location: The edge of a field in Vermilion County, Illinois. This species was also growing along the roadside in the same area. Comments: Slender False Foxglove is very showy during the short period in which it is in full bloom. This is the most common and widespread Agalinus sp. in Illinois, probably because it can adapt to a broad range of habitats. There is some variation in the length of the leaves, the presence or absence of fascicled leaves, the size of the flowers, and the color of the flowers across different local populations. Such minor variations have led to the description of different varieties and even different species by some authorities. Generally, Slender False Foxglove differs from many other Agalinus spp. by having flowers with shorter corolla tubes and longer pedicels. In contrast, Agalinus purpureus (Purple False Foxglove) has more elongated flowers (up to 1" long) and shorter pedicels (less than ¼"). Slender False Foxglove also has darker foliage (green to reddish purple) and darker seeds than some Agalinus spp. Members of this latter group (e.g., Agalinus skinneriana) have pale green to yellowish green foliage and pale-colored seeds.
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Miss Chen
2017年08月05日
Miss Chen

Description: This annual plant is 1–2½' tall, branching occasionally. It has a tendency to sprawl in the absence of supportive vegetation. The dark green stems are grooved and hairless. The opposite leaves are 1-3" long, dark green, and linear. They have smooth margins and a prominent midvein. The leaves are usually hairless, although new growth may be slightly pubescent. Secondary leaves may develop from the axils of the primary leaves along the central stem, but they are smaller in size than the latter. Some of the upper stems develop racemes of flowers. These flowers are up to 1" long and across, and vary in color from lavender to purple. The corolla of each flower is tubular and has 5 spreading lobes that are ciliate, consisting of 2 upper lobes, 2 sides lobes, and a lower lobe. Within the throat of the corolla there are specks of dark purple and 2 patches of pale yellow. There are abundant white hairs within the corolla where the reproductive organs are located. The anthers are pale yellow and the narrow style is white. The green calyx is tubular and divided into 5 triangular lobes. These lobes are one-half the length of the calyx tube or less. The calyx is hairless and has little or no reticulation. The blooming period occurs from late summer until the fall, and lasts about a month. There is no noticeable floral scent. After the flowers are fertilized and wither away, there develops rounded capsules that are a little longer than the calyx tube. These capsules contain numerous tiny seeds. When the capsules split open at the top, gusts of wind can distribution the seeds a considerable distance. The root system is fibrous and possibly parasitic on other species of plants. Purple False Foxglove spreads by reseeding itself, and does not reproduce vegetatively. Cultivation: The preference is full or partial sun, and moist soil that is sandy or peaty. Because the seeds are small, young plantlets may wither away if they are allowed to become too dry. A soil with an acid pH is preferred. Stem & Leaves Range & Habitat: Purple False Foxglove occurs occasionally throughout Illinois (see Distribution Map), where it is native. This is one of the more common Agalinis spp. in the state. Habitats include moist sand prairies, sandy savannas, paths and openings in sandy woodlands, boggy areas, and interdunal sandflats near Lake Michigan. This plant appears to thrive in areas with occasional disturbance as this removes some of the competing vegetation. Faunal Associations: Bumblebees, digger bees (Melissodes spp.), and leaf-cutting bees (Megachile spp.) visit the flowers for nectar and pollen. The caterpillars of the butterfly Junonia coenia (Buckeye) feed on the foliage. A flea beetle, Kuschelina fallax, feeds on a very similar species, Agalinis fasciculata (Beach False Foxglove), and it is possible that this flea beetle feeds on other Agalinis spp., including Purple False Foxglove. Very little appears to be known about the relationships of these plants to mammalian herbivores as sources of food. Photographic Location: Along a path in a sandy savanna at Hooper Branch Savanna Nature Preserve in Iroquois County, Illinois, where this plant species is locally abundant. Comments: The flowers are quite attractive and produced in abundance during the late summer or fall. At one time the scientific name for this species was Gerardia purpurea, but the purple-flowered false foxgloves were reassigned to the genus Agalinis, while the yellow-flowered false foxgloves were reassigned to the genus Aureolaria. Distinguishing the different Agalinis spp. can be tricky as they have similar foliage and flowers. Purple False Foxglove has larger flowers (up to 1" long and across) than some other Agalinis spp. and they occur on pedicels (flowering stalks) that are shorter than the tubular calyx (the pedicels are about 1/8" long). The flowers are always some shade of purple or lavender, while the flowers of some Agalinis spp. are often pinkish in appearance. Purple False Foxglove is quite similar in appearance to Agalinis fasciculata (Beach False Foxglove), however this latter species has secondary leaves that are nearly as large as the primary leaves (i.e., the leaves appear to be whorled along the major stems). If they are present, such secondary leaves are smaller in size than the primary leaves in Purple False Foxglove.
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Miss Chen
2017年08月04日
Miss Chen

- Nombre científico o latino: Clerodendrum trichotomum - Nombre común o vulgar: Arbol del destino, Clerodendro japonés. - Familia: Verbenaceae. - Origen: Japón y China. - Etimología: el nombre viene del griego 'kleros' que significa suerte, destino, y 'dendron' - Sinónimo: árbol. - Arbusto grande o pequeño árbol - Altura: 2 a 5 m. - Crecimiento rápido. - Follaje: caduco, brillante, con olor desagradable cuando de frota. - Hojas pecioladas, opuestas, simples, ovadas u obovadas, con nervios marcados y márgenes ondulados, a veces finamente dentados. - Las flores presentan un cáliz rojo y la corola de color blanco, reunidas en un amplio panículo terminal. - Panículas axilares de flores bisexuadas con cáliz rosado, tubulares, con corola en embudo, pétalos redondeados, 4 largos estambres y estilo sobresaliente. - Floración: al final del verano, perfumada. - Frutos: bayas decorativas de color azul negruzco. Los frutos duran todo el invierno. - Existen cultivares interesantes por su follaje, por ejemplo, Clerodendrum trichotonum 'Variegatum': follaje variegado verde y amarillo que se vuelve verde y blanco. - Propiedades: La farmacopea india utiliza las flores para combatir las lombrices intestinales. - Uso como planta ornamental de jardín, bien plantándola en pequeños grupos o como ejemplar aislado. - Luz: semisombra o sol, al abrigo del viento. - Terreno: suelto y ligero, con un buen grado de permeabilidad. - Riego más bien abundante cada 3-4 días, que debe intensificarse más o menos según el clima. - Poda: aclarar el interior eliminando algunas ramas. - Multiplicación: por semillas o por esqueje, en primavera, utilizando un sustrato a base de turba y de arena.
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Miss Chen
2017年08月04日
Miss Chen

- Nombre científico o latino: Cistus salvifolius - Nombre común o vulgar: Jara de hoja de salvia, Jaguarzo morisco, Carpaza, Estepa borda, Estepa borrera, Estepa negra, Tomillo blanco, Hierba lobera - Familia: Cistaceae. - Origen: Europa, especie espontánea de los países mediterráneos. - Arbustos de hoja perenne típicos del clima mediterráneo y de muchas zonas del interior de la Península Ibérica. - Planta subarbustiva, que crece en forma de mata de, aproximadamente, 1 m de altura. - Recibe su nombre por tener hojas parecidas a la salvia, es decir ovaladas, rugosas y con pelos. - Su follaje es aromático. - Hojas com limbo oblongo-lanceolado. - Hojas opuestas y pediceladas. - Hojas: color verde grisáceo de 10-30 mm. - Es una jara que posee una flor de unos 4 a 5 cm de color blanco. - Flores solitarias o en cimas paucifloras, actinomorfas y hermafroditas. - Flores blancas que cubren toda la planta formando bolas con clara aplicación ornamental. - Fruto cápsula, que también aparece recubierto por pelos cortos. Es de color marrón pardusco y contiene numerosas semillas. - Tiene propiedades medicinales como astringente y tambien cicatrizante. - En algunos paises del entorno mediterraneo se utiliza para hacer infusiones. - Poco usados en jardinería en España, empiezan a utilizarse ampliamente gracias a su rusticidad, sus atractivas floraciones y a su idoneidad para formar borduras, grupos, o para revestir pendientes peligrosas. - Para la formación de pequeños setos, bancales o para crear manchas de color. - Ideal en zonas secas o sotobosques. - Soporta bien las fuertes insolaciones. - Puede sobrevivir en suelos pobres. - Terreno: seco y ligero, drenado, preferiblemente si es de composición mayoritariamente silícea. - Humedad: riego regular, más frecuente durante el período estival. - Multiplicación: mediante semillas en semillero o por esqueje una vez ha tenido lugar la floración.
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Miss Chen
2017年08月04日
Miss Chen

- Nombre científico o latino: Cistus populifolius - Nombre común o vulgar: Jara macho, Jarón, Jara cervuna. - Arbusto perennifolio. - Arbusto recto, de hasta 1,5m de altura, tallos rojizos. - Hojas aovadas, de forma acorazonada estrechadas en la punta, simples, opuestas y de largo peciolo, rugosas, lampiñas y muy grandes. - Flores blancas con estambres amarillos, que nacen en ramilletes en las puntas de las ramas; 5 sépalos rojizos, de forma acorazonada, envolviendo los 2 de los extremos a los demás. - Flores solitarias o en cimas paucifloras, actinomorfas y hermafroditas, pedicelos con pelos largos y patentes. - El fruto es una cápsula ovoide, subpentagonal, lustrosa, lampiña, que se abre en 5 valvas repletas de pequeñas semillas. - Fruto cápsula dehiscente por 5 valvas. - Aguanta bien los lugares umbríos. - Suelos sin cal. - Zonas frescas.
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Miss Chen
2017年08月04日
Miss Chen

- Nombre científico o latino: Cistus monspeliensis - Nombre común o vulgar: Jara negra, Jara de Monpelier, Jara de Montpelier. - Familia: Cistaceae. - Planta subarbustiva, que crece en forma de mata de, aproximadamente, 1,5 m de altura. - Arbusto de color verde intenso, oscuro, viscoso, con fuerte olor balsámico a ládano. - Ramas superiores pelosas y glandulosas. - Hojas lineares, largas y estrechas. Son de tacto rugoso con los márgenes generalmente revolutos, recubiertas de pelos estrellados en el envés. - Flores blancas, con 5 pétalos y hermafroditas. Aparecen solitarias o en grupos de 8, pediceladas. - Fruto cápsula, con pelos estrellados en el ápice. - Se da en la región mediterránea extendiéndose a las islas Canarias, especialmente frecuente en Sierra Morena y Andalucia. - Aguanta bien las heladas y solanas. - Es poco exigente en cuanto al suelo ya que crece en los más pobres y descarnados.
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