Ampelocissus xizangensis | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Vitales |
Family: | Vitaceae |
Genus: | Ampelocissus |
Species: | A. xizangensis |
Binomial name | |
Ampelocissus xizangensis | |
Ampelocissus xizangensis (xi zang suan lian teng in Chinese) is a deciduous vine in the Vitaceae family, native to shrublands in the high valleys of the Tibet Autonomous Region and Nepal, at elevations about 2000 m high.
Its specific epithet is a toponym derived from the place it was collected from, Xizang, which is the Chinese name for the Tibet Autonomous Region. It was first scientifically described in 1997 by the Chinese botanist, Li Chao-Luang. [1]
The lianas of A. xizangensis are woody. Its climbing branchlets, which are cylindrical and gradually tapering, have longitudinal ridges and sometimes a slight, pale wooliness. [2]
Dividing off from them are characteristically bifurcated tendrils, which appear as twisting cork-screws. These grow towards and slowly grip whatever tall, stationary object they happen upon. This action, called circumnutation, has the real effect of securing and pulling the branches higher, thus enabling its leaves exposure to the sun for photosynthesis. The whole process is repeated continuously throughout the life-cycle of the plant. [2]
The leaves of A. xizangensis are simple. Leaflets are typically between 23 – 24 cm long, broadly ovate, cordate at their bases, rounded and obtuse at their apexes, and finely-toothed on their margins. Each has 5 basal veins, and 4 or 5 pairs of lateral veins. Smaller veins are barely noticeable on the leaf's upper (adaxial) surface, while being slightly prominent on the under (abaxial) side. They are intricately downy with brown tomentum adaxially, and covered in somewhat long and straight, slightly stiff but weak, hairs abaxially. The petiole is about 15 cm long, and only covered sparsely in brownish, arachnoid hairs, which tend to be shed over time. [2]
The flower buds of A. xizangensis emerge elliptic, with a rounded apex, and measure 2 to 2.5 mm in length, blooming in July. [2]
| Inflorescences are leaf-opposed, compound dichasiums (at left). The inflorescence's base branches into two peduncles before terminating in a tendril. The peduncles, which are about 6 cm long, branch into pedicels, and are, like the petioles of the leaves, sparsely matted in arachnoid tomentum; but unlike the petioles, these tend not to be shed. [2] |
The pedicel, which is 1-1.5 mm long, wears a sparse coat of glandular hairs. The calyx is nearly hairless, has pendulous lobes and is generally saucer-like in shape. Petals are smooth, ovate-oblong, and measure 1.5-1.8 mm. There are 5 stamens, each topped by an oval anther. The lower portion of the ovary is adnate to the flower's disk, which is lobed and clearly visible. The style is short with ridges, about ten in number. [2]
The fruit of A. xizangensis is a one- to four-seeded, grape-like berry.
Pachypodium ambongense belongs to the dogbane family Apocynaceae, which has recently been merged with the milkweed family Asclepiadaceae. It was first published as a species of the genus Pachypodium in 1924 by the botanist Henri Louis Poisson.
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Solanum evolvuloides is a species of Solanum, which was first described in 2011 by Giacomin & Stehmann. Solanum evolvuloides belongs to section Gonatotrichum, a small group assigned to the Brevantherum Clade of the genus Solanum. It resembles Solanum turneroides Chodat, sharing with it heterandry, and Solanum parcistrigosum Bitter, with which it shares a similar habit and pubescence. Despite these similarities, the species can be recognized by its ovate-elliptic to cordiform leaf shape and more membranaceous leaf texture than the other species in the section, and stem, inflorescence axes, and calyx vestiture mainly composed of glandular hairs. Solanum evolvuloides is known to occur only in southeastern of Bahia state, Brazil, and in a preliminary assessment of the International Union for Conservation of Nature (IUCN) criteria can be considered a threatened species.
Meconopsis horridula, the prickly blue poppy, is a flowering plant from the Papaveraceae family. It is an endangered species that grows in high altitudes. The height of the plant varies from 20 cm to 1m. It is a monocarpic, dicot plant.
Ribes sanchezii is a species of currant, named after Peruvian botanist Isidoro Sánchez Vega of Cajamarca. This species of Ribes is distinct form both R. andicola and R. colandina because of its ovate to elliptical leaves with a very poorly developed lateral lobe and its aberrant indument. The two latter species have leaves with pubescence on both the adaxial and abaxial surface and the adaxial leaf surface is matt green, whereas R. sanchezii has a shiny dark green upper leaf surface and pubescence abaxially restricted to the primary and secondary veins. Ribes sanchezii also has strongly resupinate fruits, whereas the fruits of R. andicola and R. colandina are pendulous.
Oxalis griffithii is an Oxalis species found in thickets and meadows of Bhutan, China, India and Japan. Perennials 7–25 cm tall, stemless, pubescent. Rhizome creeping underground, entirely densely covered by dark brown scalelike remains of leaf bases, 6–12 mm thick including scales; scales strigose. Leaves basal; petiole 6–20 cm, pubescent, trichomes brown and curled; leaflet blades obtriangular, 1–2.5(–4.5) × 1.5–3.5(–5.5) cm, abaxially pubescent, adaxially glabrous, apex broadly emarginate to subtruncate; lobe apices obtuse. Flowers solitary, nodding; peduncle 4–15 cm, equal to or longer than leaves; bracts at middle of flowering stalk, lanceolate, 2.5–4 mm, with dense trichomes along midvein and margins. Sepals lanceolate, 5–7 mm, persistent. Petals white with lilac veins, rarely pink (Hubei), narrowly obovate, 1.2–1.6 (–2) cm, apex retuse to deeply emarginate. Capsule oblongconic, 5–13 × 5–6 mm. Seeds ovoid, 2.5–3.5 mm, longitudinally ridged. Mixed deciduous or coniferous forests, thickets, moist and dry shady places; 800–3400 m. found in China, Taiwan, Bhutan, India, Japan, Kashmir, Korea, N Myanmar, Nepal, Philippines.
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