Pinanga declinata

Family: Arecaceae    棕榈树

通用名称: 没有已知的

枝条抗寒性区: 10b     英国和美国的地带地图

鉴别:
Stems clustered, to 5 m tall, 3–5.5 cm diameter, densely covered with reddish-brown scales. Leaves 5–7; sheaths closed, forming crownshafts, 43–57 cm long, yellowish with reddish-brown scales; petioles 19–52 cm long, yellowish; rachis 105–111 cm long; pinnae linear, contracted at the bases, 20–21 per side of rachis, middle pinna 38–69 cm long, 3.5–5 cm wide at the middle, apical pinna 6.5–21 cm long, 3.5–5 cm wide at the middle, lobed; veins prominent adaxially. Inflorescences infrafoliar, spreading; peduncles 2.5–3 cm long, 0.5–1 wide; prophylls 14–17 cm long; rachis 3.5–4 cm long; rachillae 4–8, 15–22 cm long, glabrous, triangular in cross-section, with one flat surface with no triads, the triads arranged along the other two surfaces; triads distichously arranged, occasionally spirally arranged; staminate flowers not known; pistillate flowers 2 mm long; sepals 3, 2 mm long, imbricate, the margins ciliate, acuminate; petals 3, 2 mm long, imbricate, the margins ciliate, not acuminate; ovary 2.5 mm long; fruits 1.5–2 cm long, 0.5–0.7 cm diameter, narrowly ellipsoid, color unknown; endosperm ruminate.

一般资料:
A new species described in 2008 form south-central to south-eastern Vietnam. Pinanga declinata is similar to P. sylvestris but differs in its yellow (versus green) sheaths and petioles and pinnae which are strongly contracted at the bases. It can be distinguished from the similar P. annamensis by its 20–21 linear (versus 8–12 falcate) pinnae which are contracted at the bases (versus not contracted), and spreading (versus pendulous) rachillae.

分布:

最初是从, Vietnam


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