Impatieyis.'] xxxii. gekaniace/E (olivek). 299 



** Leaves alternate. 



Stem 1-2 in. Leaves cordate. Peduncle solitary, very long . . . \0. I. palpebrata. 

 Steni 2-3 ft. Leaves not cordate. Peduncles numerous. 



Wings narrow-linear H. I. hiam. 



Wings very large, broad. Leaves crenate, with cilia in the crena- 



tures 12. /. macroptera. 



Wings broad. Leaves serrate \:\. I. Ruthti. 



fi. Lip with a long slender spur. Flowers umbelltd. 



* Lip funnel-shaped, gradually narrowed into a pendulous spur, 2-1 



in. long 'W, I. tinctona. 



** Lip very short, suddenly narrowed into a slender spur. 



Leaves serrate Bracts large. Spur up-curved, twice as long as the 



wings 15. /. abyttinica. 



Leaves serrate. Bracts small. Spur 4-5 times as long as the wings. 16. /. Walleriana. 

 Leaves crenate. Bracts large. Spur as long as the wings . . . .17. I.filicomu. 



1. !• bicolor, Hook.f. in Joiirn. Linn. Soc.y'x. 7. Stem 1-3 ft., woodv 

 below. Leaves alternate, glabrous, 3-5 in., oblong-ovate, crenate, narrowed 

 into slender glandular petioles. Flowers crowded in the axils of the upper 

 leaves; pedicels 1-2 in. Standard short, greenish-white. Wings of the 

 same colour, deeply 2-lobed, as short as the mouth of the lip which they 

 close. Lip f in. long, forming a long purple sac, with a turned-up short 

 cylindric spur. — Bot. Mag. t. 5366. 



Upper Guinea. Fernando Po (Dec), Camaroons mountain (Feb.), and Sierra del 

 Crystal (July), alt. 3000-4000 ft., Mann I 



2. I. buccinalis, Hooh.f. inJourn. Linn. Soc. vii. 187. Tall, 12-15 ft., 

 branched, glabrous, woody below. Branches often zigzag. Leaves 3-5 in., 

 petioles slender, ^-1 in., oblong-lanceolate, crenate with cilia in the crena- 

 tures. Flowers solitary or nearly so ; pedicels \-\\ in. Sepals large, orbi- 

 cular-ovate. Standard with a broad dorsal wing. Wings suborbicular, not 

 longer than the mouth of the lip. Lip \-\\ in. long, trumpet-shaped, with 

 a short, thick, sometimes double, incurved or involute spur. 



Upper Guinea. Island of St. Thomas, alt. 4000 ft., Mann ! —CoXovlt of flower un- 

 known. 



3. I. Mackeyana Hooh.f. in Journ. Linn. Soc. vii. 188. Short, 1 i f(K)t, 

 stout, glabrous, herbaceous. Leaves crowded at the top of the stem, sprejul- 

 ing, 4-7 in., narrow-lanceolate, tapering into petioles of 1-4 in., sharply ser- 

 rate ; the serratures tipped with cilia. Flowers solitary or the slender pedi- 

 cels crowded on a short peduncle, very large, purple. Sepals oblong-ovnte. 

 Standard orbicular, keeled. Wings \-\^ in. long, broadly obovate, with large 

 rounded lateral lobes. Lip boat-shaped, large, rather shallow, with a short 

 up-curved spur. 



Upper Guinea. Sierra del Crystal, on rocks in rivers (Feb.), Mann ! 



4. I. Burtoni, Hook. /. in Journ. Linn. Soc. vii. 187. Herbact-ous, 

 2-3 ft., sparsely pilose. Leaves alternate, 3-5 in., on slender iHitioles, 



