PLEUEOTHALLIS 



bo 



II. Spathe inconspicuous, scarious. 



A. Sheaths of the stem straight, adpressed, 

 not ciliate. 



1. Stem evident, leaf distant from base. 



a. Racemes many-flowered, longer 



than the leaf or about as long. 

 Sepals yellowish-green, shortly 



acute, connivent 5. 



Sepals brownish-purple, obtuse, 



connivent 6. 



Sepals deep purple, acuminate, 



divaricate 7. 



b. Flower-stalks with few flowers or 



only one, shorter than leaf. 

 Leaf 4 or 5 inches 1. Flower- 

 stalks very numerous, short, 



clustered 10. 



Leaf less than 4 inches 1. 



Basal sheaths hirsute 8. 



Basal sheaths glabrous, ovary 

 smooth. 

 Petals not subulate. 

 Sepals greenish-yellow. 



Leaf linear-lanceolate 9. 

 Leaf elliptical-lanceo- 

 late 12. 



Sepals dark purple 11. 



Petals subulate 14. 



Basal sheaths glabrous, ovary 



warty 13. 



Leaf 8 or 9 inches 1. Sepals 

 rough, about inch 1. i 19. 



2. Stem very short, leaf close to the root. 



Stems clustered. 



Flower-stalk shorter than leaf- 

 stalk. Capsule covered with 



soft prickles 18. 



Flower-stalk shorter than leaf. 



Capsule smooth 20. 



Flower-stalks much longer than 

 leaf (or about as long in P. 

 lanceola). Capsule smooth. 



Leaf roundish 15. 



Leaf not roundish. 



Flower-stalk with one flower ; 

 lateral sepals connate 



nearly to apex 16. 



Flower - stalk few - flowered ; 



lateral sepals free or not 



more than i-connate. 



Flower-stalk much longer 



than leaf. 



Sepals, apex obtuse ; 



flower-stalk zig-zag 21. 



Sepals, apex tailed 22. 



Flower-stalk about as long 

 as leaf ; .. 23. 



P. alpestris. 

 P. multirostris. 



P. laxa. 



P. ruscifolia. 

 P. hirsutula. 



P. pruinosa. 



P. Wilsonii. 

 P. brachypetala. 

 P. Morrisii. 



P. monophylla. 



P. uncinate/,. 



P. tribuloides. 

 P. jamaicensis. 



P. rotundifolia. 



P. corniculata. 



P. delicatula. 



P. Helena. 



P. lanceola. 



