PIPER—CANAVALIA AND WENDEROTHIA 559 
Ridges three, two near the ventral suture, one very close to the dorsal suture 
often united to the sutural edge; stems mostly herbaceous. 
8. Eucanavalia (Malocchia Savi). 
Ridges four, two near each suture; stems herbaceous__---- 4, Didiplopleura. 
1. Clementea. Shrubby vines with coriaceous leaflets; calyx with upper lip 
bilobed and lower lip simple; keel blunt, not produced; pod valves each with 
but a single longitudinal rib, this close to the ventral suture; seeds subglobose. 
Lower lip of calyx entire. 
Leaflets prominently reticulate; corolla 1.5 cm. long; pods dark brown, the 
valves thick ; seeds red, the (1 mm. wide) hilum two-fifths of the circum- 
ference. (Cuba) _------_--______--_-------- 1. C. cubensis. 
Leaflets not prominently reticulate; corolla 2.5 cm. long; pods pale, the valves 
not thick; seeds brown, the (2 mm. wide) hilum one-half the circum- 
ference. (Argentina, etc.) ---__--_--__------_-_-_-_- 2. C. bonariensis. 
Lower lip calyx obscurely 3-lobed. 
Leaflets 7 to 10 cm. long; pods 12 to 15 cm. long, 4 cm. broad; seeds over 2 cm. 
long__--__---------------_-------------------------- 3. C. rusiosperma. 
Leaflets 3 to 7 cm. long; pods 10 cm. long, 2.5 em. wide; seeds 1.5 cm. long. 
4, C. nitida. 
2. Diplegma. Stems woody; leaflets membranaceous or slightly coriaceous; 
upper lip of calyx emarginate; keel not produced, blunt; pod valves each with 
two longitudinal ribs, one close to each suture. 
Corolla 2.5 cm. long; pods 25 cm. long, the ribs winglike____5. C. macropleura, 
Corolla 1.5 em. long; pods 12 cm. long, the ribs not winglike___6. C. parviflora. 
3. Eucanavalia. Vines, mostly herbaceous; calyx with bilobed upper lip 
about as long as the tube, the lower lip trilobed; keel not produced, obtuse; 
pod valves each with three longitudinal ribs, one close to each suture, the 
third close to the ventral rib; inner layer of pod thin and papery, adherent in 
some species, separating in others; seeds compressed. 
Leaflets 3-nerved ___---------------------------------------- I, VARIICOLORES. 
Leaflets not 3-nerved. 
Herbage canescent-puberulent____________-_-_______-_____ II. PUBERULAE. 
Herbage green, usually minutely strigillose__.__._.___________ III. GENUINAE. 
I. VARIICOLORES, A single species__--__----------________- 7. C. variicolor, 
II. PUBERULAE. A single species____----------------------- 8. C. puberula. 
III. GenvuInaE. LHighteen species, 
Plants of the seashore, usually prostrate or procumbent but climbing when in 
thickets. Leaflets suborbicular, thickish; hilum about one-fifth the cir- 
cumference of the seed. 
Leaflets obtuse or retuse, glabrous or nearly so__----------- 9. C. maritima. 
Leaflets acute, strigillose on both faces__._____-__---------~- 10. C, apiculata. 
Plants not of the seashore, ascending or climbing. 
Fruit 20 times as long as broad. Seeds white___---___-__ 11. C. ensiformis, 
Fruit 4 to 8 times as long as broad. 
Pods short, strongly curved___--------------------- 12. C. campylocarpa, 
Pods nearly straight, elongate. 
Seeds pink-buff; pods straw-colored_____-_-_-__-_- 13. C. plagiosperma, 
Seeds ochraceous to brown, mostly unicolored; pods dark. 
Pods only 4 times as long as broad; leaflets obtuse___14. C. arenicola, 
