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FOC | Family List | FOC Vol. 25 | Orchidaceae

109. Coelogyne Lindley, Coll. Bot. ad t. 33. 1821.

贝母兰属 bei mu lan shu

Authors: Xinqi Chen & Dudley Clayton

Herbs, epiphytic. Rhizome creeping or ± pendulous, usually with rather dense nodes. Pseudobulbs distant or close, ovoid to cylindric, usually covered with leathery sheaths, usually with 2 leaves at apex but sometimes with only 1 leaf. Leaf blade often oblong to elliptic, usually thickly textured, usually petiolate at base. Inflorescence either terminal or lateral to mature pseudobulbs and either heteranthous, proteranthous, or synanthous with partially to entirely developed leaves, or hysteranthous with fully developed pseudobulb and leaves, inflorescence erect or pendulous, with or without distichous-equitant, persistent sheaths at base or imbricate, sterile, convolute sheathing bracts at interface between peduncle and rachis, sometimes its apex enclosed in a large bract or several bracts, usually several flowered, rarely more than 20-flowered or reduced to a solitary flower; floral bracts caducous, often large. Flowers opening successively or simultaneously, large or medium-sized, sometimes heteranthous. Sepals similar, often concave. Petals often linear, much narrower than sepals; lip often concave at base, 3-lobed or rarely unlobed; lateral lobes ± erect and embracing column; callus with longitudinal lamellae. Column rather long, winged on both sides and around top, without column foot; anther terminal, incumbent; pollinia 4, in 2 pairs, waxy, attached to 1 sticky substance; stigma concave; rostellum rather large. Capsule medium-sized, often ribbed or narrowly winged.

About 200 species: tropical and subtropical Asia to Oceania; 31 species (six endemic) in China.

Coelogyne venusta Rolfe (Gard. Chron., ser. 3, 35: 259. 1904) was described based on cultivated material. It is excluded from the present treatment because the cited locality "Yunnan" is incorrect and most probably resulted from the habit of early collectors to record false information; the species is only known from Borneo (Sarawak, Brunei, and Sabah).

1 Inflorescence with imbricate sterile bracts   (2)
+ Inflorescence bare to first flower, or rarely with 1 or a few sterile bracts; flowers opening simultaneously   (18)
2 (1) Inflorescence with imbricate sterile bracts mainly at base of peduncle; lip with 3 lamellae, margin of mid-lobe fimbriate   (3)
+ Inflorescence with imbricate sterile bracts at junction of peduncle and rachis   (5)
3 (2) Petals ovate-lanceolate, nearly as wide as sepals, lip not 3-lobed.   1 C. leungiana
+ Petals filiform to linear, much narrower than sepals, lip 3-lobed   (4)
4 (3) Lip mid-lobe ovate, callus with 3 lamellae, median lamella indistinct, lateral lamellae terminating near tip of mid-lobe, undulate.   2 C. ovalis
+ Lip mid-lobe orbicular, fimbriate, callus with 3 lamellae, median lamella virtually a brown vein, lateral lamellae terminating at tip of mid-lobe, initially diverging then converging at tip of mid-lobe.   3 C. fimbriata
5 (2) Rachis extending with new imbricate bracts to produce further annual sets of flowers   (6)
+ Rachis producing single set of flowers   (10)
6 (5) Pseudobulbs cylindric or narrowly ovoid   (7)
+ Pseudobulbs ovoid or ellipsoid   (8)
7 (6) Lip mid-lobe oblong-obcordate, 3-4 mm, callus with 3 lamellae, median lamella short, lateral lamellae parallel, extending from base of lip to 2/3 onto mid-lobe, low initially, then rising, abruptly terminating.   4 C. raizadae
+ Lip mid-lobe broadly oblong or subelliptic, ca. 6 mm, callus with 2 narrow longitudinal lamellae extending from base of lip to near middle of mid-lobe, prominent on mid-lobe only.   5 C. longipes
8 (6) Lip with no callus; flowers red with a partly black apex to mid-lobe.   6 C. tsii
+ Lip with a callus with 2 lamellae   (9)
9 (8) Lip mid-lobe nearly broadly oblong, 2 lamellae faint near base of lip, elevated and prominent on mid-lobe.   7 C. schultesii
+ Lip mid-lobe nearly elliptic, 2 lamellae terminating 2/3 onto mid-lobe.   8 C. prolifera
10 (5) Lip with 5 lamellae   (11)
+ Lip with 2 or 3 lamellae   (12)
11 (10) Lip with prominent lamellae, outer lamellae broader.   9 C. griffithii
+ Lip with median keel fleshy on mid-lobe.   10 C. zhenkangensis
12 (10) Dorsal sepal more than 1.5 cm   (13)
+ Dorsal sepal less than 1.5 cm   (15)
13 (12) Lip with crenulate lamellae, mid-lobe suborbicular or cordate, margin erose, 2 crenulate lamellae terminating at base of mid-lobe.   11 C. stricta
+ Lip with fimbriate lamellae   (14)
14 (13) Dorsal sepal ca. 4 cm; lip mid-lobe triangular with fimbriate margin and 3 fimbriate lamellae terminating at tip of mid-lobe.   12 C. barbata
+ Dorsal sepal nearly 3 cm; lip mid-lobe quadrangular with fimbriate margin and 2 fimbriate lamellae terminating at middle of mid-lobe, lamellae becoming a warty projection toward tip.   13 C. calcicola
15 (12) Pseudobulbs less than 4 cm; lip mid-lobe nearly orbicular, bilobed, with 3 simple, straight lamellae; flowers white with some yellow.   14 C. leucantha
+ Pseudobulbs more than 5 cm   (16)
16 (15) Inflorescence slender and arching; lip mid-lobe suborbicular, 3 crenulate or fimbriate lamellae terminating at base of mid-lobe, median keel shorter.   15 C. rigida
+ Inflorescence erect; lip with fimbriate or crenulate lamellae   (17)
17 (16) Lip with 3 crenulate and fleshy lamellae terminating at base of mid-lobe, median keel shorter.   16 C. pulchella
+ Lip with 3 fimbriate lamellae.   17 C. sanderae
18 (1) Pseudobulb with 1 leaf; flowers fleshy; lip ± entire without distinct lateral lobes, and 3 smooth lamellae.   18 C. malipoensis
+ Pseudobulbs with 2 leaves; flowers membranous; lip with distinct lateral lobes, basal part not embracing column, lip lacking transverse fold at base   (19)
19 (18) Inflorescence heteranthous; lip mid-lobe suborbicular, callus with 4 or 5 fimbriate lamellae.   19 C. cristata
+ Sepals, petals, and lip margins not undulate; lamellae not fimbriate, deeply serrate, deeply crenulate, or laciniate but entire or erose, papillate or verrucose, dentate or crenulate to irregularly cristate   (20)
20 (19) Dorsal sepal forming a hood over column, larger than lateral sepals and petals; lateral sepals and petals not widespread away from column   (21)
+ Dorsal sepal erect, away from column; lateral sepals and petals widespread away from column; sepals and petals of ca. equal length   (22)
21 (20) Lip with mid-lobe orbicular, callus with 3 lamellae, but median lamella shorter.   20 C. assamica
+ Lip with lateral lobes rounded in front, mid-lobe broadly ovate to cordate, callus with 3 fleshy, undulate lamellae.   21 C. fuscescens
22 (20) Dorsal sepal and lateral sepals of ca. equal width, petals narrower   (23)
+ Dorsal sepal, lateral sepals, and petals of ca. equal width; sepals, petals, and lip tending toward being fleshy   (26)
23 (22) Lip with mid-lobe large in relation to overall size of flower, sometimes clawed; lip with margin tending toward being membranous   (24)
+ Lip with mid-lobe not large relative to overall size of flower; lip without evident claw; lip with margin tending toward being fleshy   (25)
24 (23) Lip mid-lobe ovate, margin membranous, callus with 3 lamellae terminating at tip of mid-lobe, median keel ca. 1/2 as long.   22 C. taronensis
+ Lip mid-lobe oblong-ovate, callus with 5 lamellae, 3 crenate lamellae terminating at base of mid-lobe, 2 further lamellae continue to tip of mid-lobe.   23 C. suaveolens
25 (23) Inflorescence heteranthous, with arching peduncle and rachis; lip mid-lobe ovate-lanceolate, crenate at sinuses, callus with 3 undulate lamellae terminating at base of mid-lobe.   24 C. flaccida
+ Inflorescence proteranthous; lip mid-lobe initially with parallel sides then expanding, callus with 3 crenate lamellae terminating at ca. 1/3 way on mid-lobe.   25 C. viscosa
26 (22) Inflorescence hysteranthous   (27)
+ Inflorescence proteranthous or synanthous   (28)
27 (26) Inflorescence peduncle enclosed with bracts to rachis, lower flowers concealed by bracts; lip with 3 lamellae, median keel short, lateral lamellae terminating on mid-lobe, crenate, thickened.   26 C. occultata
+ Inflorescence bare; lip with 3 dentate lamellae converging toward base of mid-lobe then diverging and disappearing on mid-lobe, further dentate, curled lamellae appearing on outside of existing lamellae.   27 C. punctulata
28 (26) Inflorescence proteranthous   (29)
+ Inflorescence synanthous   (30)
29 (28) Inflorescence 3-8-flowered; flowers white; lip with continuous golden yellow eyes on lateral lobes, 2 yellow patches bordered with red on mid-lobe, 3 lamellae terminating at base of mid-lobe.   28 C. nitida
+ Inflorescence 2- or 3-flowered; flowers creamy yellow; lip with 3 white, crested lamellae terminating at middle of mid-lobe.   29 C. weixiensis
30 (28) Sepals lanceolate; petals narrowly lanceolate; flowers white, 4 large yellow eyes bordered with orange-red on lip; lip with 3 low lamellae terminating at base of mid-lobe, crenulate.   30 C. corymbosa
+ Sepals subelliptic; petals subrhombic-elliptic; flowers cream-colored with brown veins on lateral lobes and deep yellow lamellae.   31 C. gongshanensis

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