All Floras      Advanced Search
FOC Vol. 25 Page 8, 13, 488 Login | eFloras Home | Help
FOC | Family List | FOC Vol. 25 | Orchidaceae

183. Luisia Gaudichaud, Voy. Uranie, Bot. 426. 1829.

钗子股属 chai zi gu shu

Authors: Xinqi Chen & Jeffrey J. Wood

Mesoclastes Lindley.

Herbs, epiphytic or lithophytic, monopodial. Stems erect or climbing, often branched at base and tufted, some with a single shoot, terete, slender, usually stiff, enclosed in leaf bases. Leaves many, well spaced, linear, terete, distichous, facing all directions or secund, fleshy, jointed and sheathing at base. Inflorescence axillary, racemose, dense, subsessile, fewer than 10-flowered; peduncle and rachis attenuate. Flowers usually small, fleshy. Sepals and petals free, similar or petals longer and narrower, spreading; lateral sepals often dorsally carinate or narrowly winged toward apex. Lip pendulous, fleshy, fixed immovably to base of column, often distinctly divided by a groove into basal hypochile and apical epichile; hypochile often concave, base sometimes with lateral lobes embracing column; epichile often extending forward, adaxially often longitudinally wrinkled or grooved. Column subcylindric, short, stout, foot absent; rostellum short, wide, apex subtruncate; pollinia 2, waxy, globose, porate, attached by a short and broad stipe to a solitary, short, broad viscidium.

About 40 species: Bhutan, China, India, Indochina, Indonesia, Japan, Malaysia, New Guinea, Pacific islands, Philippines, Sri Lanka, and Thailand; 11 species (five endemic) in China.

Luisia macrotis H. G. Reichenbach (Gard. Chron. 1869: 1110. 1869) was recently recorded from W Yunnan (Lushui: Gaoligong Shan, 2500 m) by X. H. Jin, H. Li, and D. Z. Li (Acta Phytotax. Sin. 45: 805. 2007). The species otherwise occurs in India (Assam), Laos, Thailand, and Vietnam.

Reviewer L. Averyanov notes that Luisia appressifolia Averyanov (Lindleyana 15(2): 79. 2000), described from N Vietnam, should also occur in S China. However, the present authors could not substantiate this assertion because they found no relevant specimens.

1 Petals linear, 1.5-2 mm wide   (2)
+ Petals oblong or elliptic, 4-9 mm wide   (3)
2 (1) Sepals and petals whitish; epichile of lip broadly ovate-triangular.   9 L. filiformis
+ Sepals and petals green; epichile of lip cordate.   11 L. cordata
3 (1) Carinate midvein on abaxial surface of lateral sepals protruding from apex forming a tooth or a fine sharp point   (4)
+ Carinate midvein on abaxial surface of lateral sepals becoming winged at apex or sometimes protruding from apex forming a keeled or winged mucro   (6)
4 (3) Lip without a distinct boundary between epichile and hypochile.   1 L. longispica
+ Lip with a distinct boundary between epichile and hypochile   (5)
5 (4) Sepals and petals yellowish green; epichile of lip emarginate at apex, margin ± erose.   2 L. morsei
+ Sepals and petals purple-red; epichile of lip obtuse at apex, margin entire.   10 L. ramosii
6 (3) Lip with a distinct boundary between epichile and hypochile.   3 L. magniflora
+ Lip without a distinct boundary between epichile and hypochile   (7)
7 (6) Lip unlobed at apex   (8)
+ Lip bilobed at apex   (9)
8 (7) Petals yellowish green, narrowly oblong, 1.6-1.8 mm wide; hypochile narrower than epichile.   7 L. brachystachys
+ Petals pink, obovate-elliptic, 3-3.2 mm wide; hypochile wider than epichile.   8 L. zollingeri
9 (7) Dorsal sepal 13-17 mm; epichile of lip distinctly adaxially reticulate-sulcate.   6 L. megasepala
+ Dorsal sepal 6-11 mm; epichile of lip not adaxially reticulate-sulcate   (10)
10 (9) Petals ca. 6 mm; epichile of lip with 3 or 4 papillate longitudinal adaxial ridges.   4 L. hancockii
+ Petals 7-13 mm; epichile of lip with a fleshy longitudinal adaxial ridge.   5 L. teres

  • List of lower taxa


    Related Objects  
  • Luisia.pdf
  • PDF

  • Flora of China @
    Browse by
    Advanced Search

    Flora of China Home




     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |