CROTONS OF THE UNITED STATES. 37 
c. Annual; margins of the leaves entire or nearly so; calyx of the short 
pedicelled, capitate or racemose pistillate flowers 3- to 8-parted 
and accrescent. 
1. Calyx 6- to 8-cleft; styles twice or more bicleft. 
Petioles long; leaves slightly or not at all cordate; capsules 
large, often forming a cluster at base of raceme, covered 
with a woolly, purplish tomentum. C. capitatus. 
Petioles short; leaves cordate ; pistillate flowers racemose. 
Woolly tomentum of the calyx yellowish. C. Hngelmanni. 
Appressed tomentum white. C. Engelmanni albinotdes. 
Petioles short; leaves lanceolate; pistillate flowers capitate, 
smaller than in C’. capitatus, not loose woolly. C. Muelleri. 
Petioles short; leaves linear; sepals hooded. C. Elliottii. 
2. Calyx very unequally 5-cleft; leaves ovate; styles bicleft. 
C. leucophyllus. 
8. Calyx 3-cleft by abortion of two inner sepals. 
C. leucophyllus trisepalis. 
d. Suffruticose; margins of leaves entire; pistillate flowers long pedi- 
celled, racemose, or rarely from the base of the raceme; calyx 
5-parted, often accrescent; capsule 3-celled. C. corymbulosus. 
e. Annual; margins of leaves entire; pistillate flowers not racemose, 
i.e., from the base of the raceme, at length pendent; calyx 3- to 
5-parted, sometimes accrescent. 
Ovary 3-celled, capsule 3-seeded; leaves oval. 
C. Lindheimerianus. 
Ovary 2-celled, capsule 1-seeded. C. monanthogynus. 
III. Pistillate and staminate flowers apetalous; calyx 5-parted, never 
accrescent; dioecious, or sometimes monoecious in C. punctatus; 
stipules obsolete. 
A. Suffruticose or perennial; branches scurfy, whitish. 
a. Both sides of leaves stellate or scaly-stellate; staminate raceme 
rarely exceeding 3 cm. in length. 
Diffuse; near sea-shore along the lower Atlantic and Gulf 
coasts. C. punctatus. 
Procumbent (erect in the varieties) or ascending; leaves long 
petioled, oblong or oval, stellate. C. Californicus. 
Leaves stellate, short petioled, oblong to lanceolate. 
C. Californicus tenuis. 
Leaves oval, only slightly stellate above. 
C. Californicus longipes. 
Leaves oval, small; stems much branched, digitate. 
C. Californicus Mohavensis. 
b. Leaves only slightly, or usually not at all, pubescent above; generally 
oblong; staminate raceme 4cm.ormore long. C. Neo-Mexicanus. 
B. Annual; erect; capsules generally muricate. C. Texensis. 
C. Annual; slender; capsules yellowish, never muricate (local). C.virens. 
