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FOC | Family List | FOC Vol. 25 | Orchidaceae

110. Pleione D. Don, Prodr. Fl. Nepal. 36. 1825.

独蒜兰属 du suan lan shu

Authors: Xinqi Chen, Phillip J. Cribb & Stephan W. Gale

Herbs epiphytic, lithophytic, or terrestrial. Pseudobulbs annual, often clustered, ovoid, conic, pyriform, or turbinate, gradually narrowed toward apex to form a distinct neck, sometimes abruptly contracted into a very short neck, 1- or 2-leaved at apex. Leaves usually papery, plicate, usually contracted at base into a short petiole-like stalk, usually deciduous or falling in winter. Inflorescences 1 or 2, arising from base of an old pseudobulb, erect, appearing either before or after leaves, 1- or 2-flowered; floral bracts often colorful, persistent. Flowers large, usually showy, opening widely, sometimes fragrant. Sepals usually free, similar. Petals similar to but usually slightly narrower than sepals; lip conspicuously larger than sepals, entire or obscurely 3-lobed, sometimes basally adnate to column base, apical margin erose or lacerate; disk with a callus consisting of 2 to several lamellae or rows of papillae extending along central veins. Column slightly arcuate, slender, winged above, apex usually erose; pollinia 4, in 2 pairs, waxy, often obovoid and bilaterally flattened. Capsule fusiform, with 3 longitudinal ribs.

About 26 species: from Nepal, across C, S, and E China and Bhutan, south to Laos, Myanmar, Thailand, and Vietnam; 23 species (12 endemic) in China.

1 Pseudobulb 2-leaved   (2)
+ Pseudobulb 1-leaved   (6)
2 (1) Plants spring-flowering; leaves developing at flowering   (3)
+ Plants autumn-flowering; leaves deciduous or withered at flowering   (4)
3 (2) Lip much broader than long, apex obtuse or emarginate; callus on disk composed of 5-9 lacerate lamellae.   5 P. scopulorum
+ Lip ca. as broad as long, apex subacute; callus on disk composed of 5-9 rows of papillae that grade into lacerate lamellae midway along mid-lobe.   6 P. kaatiae
4 (2) Sheaths on pseudobulb warty; pseudobulb green, mottled purplish brown; column 35-45 mm.   3 P. praecox
+ Sheaths on pseudobulb smooth; pseudobulb green; column 14-20 mm   (5)
5 (4) Pseudobulb turbinate to pyriform, usually with a short, indistinct neck; lip 3-lobed at or below middle; apical margin of lip erose; column 17-20 mm.   1 P. maculata
+ Pseudobulb ovoid-conic or flask-shaped, apex contracted into an elongate neck; lip 3-lobed above middle; apical margin of lip emarginate and undulate, not erose; column 14-17 mm.   2 P. autumnalis
6 (1) Plants autumn-flowering; pseudobulb turbinate, dorsiventrally flattened, much thicker than tall; sepals fused in basal half and forming a tube.   4 P. saxicola
+ Plants spring-flowering; pseudobulb ovoid to conic, taller than thick; sepals free to base   (7)
7 (6) Callus on lip composed of rows of individual papillae   (8)
+ Callus on lip composed of entire, erose, lacerate, or denticulate lamellae   (12)
8 (7) Sepals and petals white   (9)
+ Sepals and petals pink, rose-purple, pale purplish red, or purple   (10)
9 (8) Lip base saccate and with a short spur 1-2 mm.   10 P. albiflora
+ Lip base neither saccate nor spurred.   11 P. humilis
10 (8) Sepals 39-50 mm; petals strongly reflexed.   9 P. aurita
+ Sepals 20-35(-45) mm; petals spreading, not reflexed   (11)
11 (10) Lip with 7 rows of papillae; plants often stoloniferous.   7 P. hookeriana
+ Lip with 6 rows of papillae; plants not stoloniferous.   8 P. chunii
12 (7) Flowers orange-yellow, yellow, or yellowish white, sometimes with red, crimson, or brown marks on lip, and sometimes overlaid with purple on sepals and petals   (13)
+ Flower white, red, or purple, never tinged with yellow   (15)
13 (12) Lamellae on lip entire.   13 P. forrestii
+ Lamellae on lip slightly erose or erose-lacerate   (14)
14 (13) Sepals and petals yellow, not overlaid with purple.   14 P. ×confusa
+ Sepals and petals yellow, overlaid with purple.   15 P. ×christianii
15 (12) Floral bract shorter than ovary   (16)
+ Floral bract ca. as long as or exceeding ovary   (17)
16 (15) Lip purplish, pink, or sometimes white, with purple or deep red spots on lip; lamellae on lip entire or slightly erose.   16 P. yunnanensis
+ Lip purplish pink, sometimes tinged white, with bold broad purple stripes on apical margin; lamellae on lip ragged.   17 P. ×taliensis
17 (15) Sepals and petals pure white   (18)
+ Sepals and petals bright rose-purple, purplish violet, pink, rose-pink, pale purple, purplish red, or white tinged pink (occasionally pure white in P. formosana)   (19)
18 (17) Dorsal sepal 30-40 mm; lamellae on lip entire.   13 P. forrestii
+ Dorsal sepal 50-55 mm; lamellae on lip lacerate.   18 P. grandiflora
19 (17) Lamellae on lip lacerate.   12 P. ×kohlsii
+ Lamellae on lip entire, erose, or denticulate   (20)
20 (19) Pseudobulb geniculate-curved; leaf 0.2-1.1 cm wide.   23 P. microphylla
+ Pseudobulb not curved; leaf 2-7 cm wide   (21)
21 (20) Sepals 28-35 mm; lip 25-40 mm; column 25-30 mm.   22 P. limprichtii
+ Sepals 35-65 mm; lip 35-55 mm; column 27-45 mm   (22)
22 (21) Lip strongly deflexed at apical 1/3, lacking marks on lateral lobes; disk with 2 or 4 denticulate lamellae.   21 P. pleionoides
+ Lip not strongly deflexed, with reddish, brownish, or dark purple marks on lateral lobes; disk with 2-5 entire or erose lamellae   (23)
23 (22) Lip usually same color as sepals and petals; disk with 4 or 5 erose, uninterrupted lamellae.   19 P. bulbocodioides
+ Lip usually different in color from sepals and petals; disk with 2-5 entire or erose, usually interrupted lamellae.   20 P. formosana

  • List of lower taxa


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