Habenaria.| CXXXIII. ORCHIDEÆ (ROLFE). 207 
beaked.—Terrestrial herbs, with the habit of Orchis. Tubers ovoid- 
globose or rarely lobed. Flowers small or large, in lax or dense spikes 
or racemes. Bracts mostly narrow. 
A genus of about 400 species, widely diffused through tropical and subtropical 
regions. 
I have followed Kränzlin and most other authors in retaining Platanthera, which 
is sometimes referred here, as a distinct genus, on account of the sessile or subsessile, 
more or less confluent stigmas. 
Petals entire. 
Lip entire. 
Pedicels 24 lin, long; flowers 14 lin. long, rose . 1. H. calcarata, 
Pedicels 6-10 lin. long; flowers 23-4 lin. long, 
green or white. 
Spur entire at the apex. 
Sepals 25-3 lin. long . : : : . 2. H. zambesina, 
Sepals 4—5 lin. long. : S e . 3. H. stenochila. 
Spur shortly bifid at theapex . . 4. H. leonensis. 
Lip trilobed or tripartite (side lobes rarely very small). 
Side lobes of lip entire. 
*Leaves cauline, more or less elongated or nar- 
row 
Spur shorter than the lip. 
Lip trilobed. 
Leaves 2-7 lin. broad. 
Sepals 1 lin. long. 
Leaves ovate-oblong, 3-1} in. long 5. H. Montolivea, 
Leaves E "a: in. 
long . 5 6. H. debilis. 
Sepals ER lin. ltr - , V. H. Rendlet. 
Leaves 3 BEEN in. broad S . - 8. H. microceras. 
Lip tripartite. 
Raceme short, dense . S ; , 9. H. combusta. 
Raceme elongate, lax . 2 , "JO. H. peristyloides. 
Spur as long as the lip e e , 11. H. cardiochila, 
Spur longer, but not more than twice as long 
as the lip. 
Spur cylindrical, 23 lin. long . , 12. H. tenuispica. 
Spur clavate, 4 lin. long : - . 13. H. Erythree. 
Spur slender, 4-1 in. long. 
Leaves linear or oblong-linear. 
Inflorescence dense. . > e . 14. H. clarencensis. 
Inflorescence lax. 
Leaves oblong-linear. 
Front lobe of lip slightly longer 
than the side lobes. 
Lobes of lip 1-14 lin. long . 15. H, attenuata. 
Lobes of lip 2-24} lin. long 16. H. Spiranthes. 
Front lobe of lip twice as long as 
> the side lobes - . S > 17. H. filicornis. 
Leaves linear . ; S z . 18. H. chlorotica, 
Leaves lanceolate to oblong. 
Abyssinian species. 
Racemes dense. 
Flowers 1-3 lin. diameter . . 19. H. variabilis. 
Flowers 4-5 lin. diameter . , 20. H. bracteosa. 
