152 CXXXIII. ORCHIDE# (ROLFE). | Listrostachys. 
Flowers small or rarely medium-sized (un- 
known in 48). Spur usually more or less clavate 
or vesicate at the apex, seldom 4 in. long. 
*Stems more or less elongated and climbing (unknown 
in 21). 
Lip pandurate or subpandurate, 
‘Spur clavate, slightly longer than the sepals . 19. L. ashantensis. 
Spur slender, nearly twice as long as the sepals 20, L. Popagayi. 
Lip ovate-oblong or obovate. 
Lip truncate-emarginate . 21. L. Bakeri. 
Lip acute or cuspidate. 
Spur slender . 22, L. acuta. 
Spur subclavate ; . 23. L, subclavata. 
Lip very broad, shortly trilobed in front 24. L. bidens. 
Lip orbicular or suborbicular 25. L. monodon, 
**Stems usually short and stout, or not Bette 
Leaves flat. 
Flowers in elongated racemes, 
Leaves 4 to more than 2 in. broad. 
Flowers and bracts alternate, 
Racemes dense. 
Spur strongly clavate. 
Lip entire, flat or nearly so. 26. L. pertusa. 
Lip trilobed with erect side lobes . 27. L. clandestina. 
Spur scarcely thickened upwards. 
Leaves 10 lin. broad 5 . 28. L. gabonensis. 
Leaves 4 lin. broad. S . 29. L. multiflora. 
Racemes lax. 
Spur not, or scarcely, exceeding the 
lip. 
Disc of lip witha small basal tooth 30. L. pellucida. 
Disc of lip without a basal tooth . 31. Z. divitiflora. 
Spur twice as long as the lip. 
Spur 4-5 lin. long. 
Leaves 13-2 in. broad . . 32. L. vagans. 
Leaves 5-7 lin. broad . 33. L, thomensis. 
Spur 8 lin. long A . 34. L. ichneumonea. 
Flowers and bracts opposite. 
Spur more than twice as long as the 
segments , . 
Spur about as long as the segments. 
Sepals and petals 5-6 lin. long, acu- 
minate, 
Spur abruptly dilated on one sore 
14 lin. broad 
Spur clavate, 1 lin. broad wade 
Sepals and petals 3 lin, long, acute . 
Flowers and bracts verticillate 
Leaves very narrow, 1-14 lin. broad, 
Sepals ovate or triangular : 
Sepals very narrow and acuminate . 
Flowers in dense, capitate heads, 
Leaves 7-8 in. long. 
Lip cuneate at the base 
Lip hastate . 
- 40. L. 
. 41. L. graminifolia. 
. 35. L. vesicata. 
. 36. L. fragrantissima. 
L. 
38. L. Kirkii. 
. 39. L. urostachya. 
Welwitschii. 
Virgula. 
42. L. capitata. 
. 43. L. cephalotes. 
