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Tên Khoa học: Aspidistra zhangii Aver., Tillich & K.S. Nguyen
Tên tiếng Anh:
Tên tiếng Việt: Tỏi đá chương
Tên khác:

MÔ TẢ CHUNG

Terrestrial perennial herb with epigeous few branching, plagiotropic rhizome.  Rhizome thick, stout, rather long, up to 10 cm long, (4)5 – 6(7) mm in diam., covered by gray  or yellowish-gray fibrous remains of cataphylls. Leafy shoot at apex of rhizome, ascending to  suberect, very short, simple, (0.5)1–2(2.5) cm tall, (6)8 –10(12) mm in diam., many-nodal,  with few thick, light gray roots, 4  –5 mm in diam. Young cataphylls conduplicate to almost  tabular, narrowly triangular lanceolate (being flattened), obtuse, light green, herbaceous, straight,  upright, (2)4  – 6(8) cm long, (2)4  – 6(8) mm wide, prominently broadening at the base. Leaves on  individual shoot (2)3 –5(6), petiolate; petiole dark green, stiff, rigid, erect to suberect, straight or  slightly curved, (4)6 – 8(12) cm long, (1)1.5 –2.5(3) mm in diam., adaxially grooved; leaf blade  arching to almost horizontal, herbaceous to leathery, more or less flat, obliquely elliptic, slightly  acuminate and acute at apex, (14)18 –25(30) cm long, (3.5)4  –7(8) cm wide, straight or hardly  irregularly wavy along margin, uniformly grass-green on both sides, with prominent median  and few secondary veins. Flowers (1)2–  4(5), solitary, arising from basal part of leafy shoot,  shortly pedunculate, odorless, widely opening, (1.8)2–2.2(2.4) cm in diam. Peduncle almost  horizontal, very short, (2.5)3 –  4(5) mm long, light green to white, completely enveloped by  3 –  4(5) densely imbricate, sterile bracts; sterile bracts greenish tinged with dirty purple-brown  to uniformly dirty purple-brown, broadly triangular, obtuse, with broad base, usually apically  splitting, concave, papyraceous, (5)7–9(10) mm long, (5)6 –14(16) mm wide (being flattened).  Perigone tube widely obconical, white or white with greenish tint, fleshy, smooth and glossy,  (1.3)1.4  –1.6(1.7) cm long, (1.8)2–2.2(2.4) cm wide, with 6(7) free lobes at apex. Perigone  lobes subequal, fleshy, slightly concave, smooth and glossy, uniformly dark purple-brown to  almost black, broadly triangular ovate, (5.5)6 –7(7.5) mm long, (6.5)7– 8(8.5) mm wide, blunt  to roundish at apex; petals with distinct triangular thickening abaxially near apex. Stamens 6,  sessile, placed in middle part of the tube; anthers oblong elliptic, (3.6)3.8 –  4(4.2) mm long,  (1.8)2–2.2(2.4) mm wide, distant from each other; pollen sacs introrse; pollen bright yellow.  Pistil white; style fleshy, widely obconical, (8.5)9 –10(11) mm tall and wide, with 12 (6 tall and  6 much smaller) longitudinal ridges, with deep grooves between them; stigma convex to almost  hemispheric, (8.5)9 –10(11) mm in diam., circular in outline, with 6 low, broadly triangular lobes,  blunt or roundish at apex (sometimes with a small insignificant dent between lobes), fleshy, finely  papillose, white. Ovary inconspicuous, very indistinct, white or white with light olive tint. Fruits  globular, with rough, green surface, (1)1.2–1.4(1.5) cm in diam.

Etymology

Species epithet refers to the name of the distinguished Chinese botanist, Professor Zhang Dianxiang, specialist in plant taxonomy and phylogeny, educator of species discoverer. 

Distribution

Northern Vietnam (Ninh Binh province).

Endemic.

Habitat, phenology and conservation status

Terrestrial creeping herb. Lowland broad-leaved  evergreen forests on alluvial soils derived from limestone. Flowering in cultivation in May–June,  fruits in nature in December–January.

Locally common.

Estimated IUCN Red List status DD

ẢNH

Aspidistra zhangii on Wulfenia 23 (2016) - 1.jpg at www.BotanyVN.com

Ảnh 1. Aspidistra zhangii on Wulfenia 23 (2016) - 1.jpg

 

PHÂN LOẠI KHOA HỌC
Giới: Thực vật
Ngành: Magnoliophyta
Lớp: Liliopsida
Bộ: Asparagales
Họ: Asparagaceae
Chi: Aspidistra

CHỈ SỐ

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