108 



EUPHORBIACEAE. 



15. JATROPHA L. Herbs or partially woody plants. Leaf -blades 

 angled or lobed. Flowers in forked cymes. Staminate llowers with ."> sepals, 

 5 small petals, and 10 stamen-. 1'istillate flowers with a 2-3-eelled ovary. 



1. J. multifida L. Perennial, 9-20 dm. tall: leaf-blades palmately 9-11-lobed, 

 mostly 10-20 cm. wide, the lobes narrow, entire or incised: cyniules .Mini- 

 petals thrice as long as the sepals, scarlet: capsules globose-obovoid, 2.5-3 cm. 

 long, smooth. Pinelands. Nat. of Trop. Am., and cultivated. (Ant.) 



16. MANIHOT Adans. Herbs or shrubs. Leaf-blades entire or palmately 

 lobed, or parted. Flowers in racemes. Staminate flowers with 5 sepals 

 and 10 stamens. Pistillate flowers often smaller than the staminatc. with a 

 3-celled ovary. 



1. M. Manihot (L.) Karst. Plants 9-16 dm. tall or more: leaf-blades 3-7- 

 parted: capsules with crenate-undulate wings. Pinelands and cultivated 

 grounds. Nat. from 8. Am., and cultivated. F. K. (Ber., Bah., Cuba, Ant.) 



CASSAVA. 



17. CHAMAESYCE S. F. Gray. Annual or perennial herbs or shrubs. 

 Leaves opposite: blades oblique at the base. Involucres axillary or in axillary 

 cymes, each with 4 naked or appendaged glands, one sinus being glandless. 

 Capsules smooth, sometimes pubescent. Seeds smooth or transverse-wrinkled. 



SPURGE. 



I..-af Uadrs entire. 



Plants wltb prostrate stems and branches. 

 I'lnntn nnnual or biennial. 



S.-.'.K .,V*T 1..1 1111:1. loiin : capsule glabrous. 1. C. Inu<ill*tt. 



Seeds less than 1 " mm. long : cap-uii- pubescent. 



Stem and branches finely canes. -..|,t :riil. 



Stem and branches hirsute or vlllous-hlrsnte. 



Larger leaves with oblong or ovate blades. 8. ('. i.r<ichnil,i. 

 Larger l.-aves with deltoid or renlform blades. 4. C. plm-torum. 

 Plantn perennial. ."- '' ' lt<>i<l,-ti. 



Plants with erect or ascending stems nnd branches. 



Involucre 1.5-2 mm. long: seeds fully 1 mm. log : 



stems succulent. i,,,j-if,,ii>i. 



Involucre 1 mm. long : seeds less than 1 mm. long : 



stems wiry. ~ '' l'rtrrinna. 



Leaf-blades toothed. 

 Capsule glabrous. 



Stem nnd brunches prontrnte. >> '' /.''"'/ ttH 



Stem and branches erect or ascending. 



Leaf-blades linear i.r narrowly linear-lanceolate. 1>. C.hittopif<>n. 



Leaf-blades broader. 



Seeds r.-.l or brown : capsules with rounded lobe*. H>. f. tivprririfnHa. 

 Seeds gray: capsules with sharp lobes. 11 '*. hr<iIHe**to. 



f'apsulfl plllM-srenf. 



Stem and branches erect or ascending. ''. Tractf. 



Stem and branches prostrate. 



Involucres nxlllnry. sometlmnw niipnixlmate on Int 



eral branches: plnelnnd (ilantx 



Involilcro deeply split <-n inn- side. ' ;><riinminn. 



Involucre not split on cine side. 



elands of the Involucre with Inconspicuous 



-..luges. 1 . f. <;,n(,rln 



Olnnds of the Involucre with petal-like ap- 



pendages. !.%. C. mil nnptrra. 



Invnlucres In peduncled clusters : hammock plants. 

 Plants erect or ascending : Involucre glands long- 



stalked. Irt. r lii'-i't 



Plants prostrate : Involucre glands short stnlk.<! 17 '' /tn<//'i 



1. C. Ingallsll Small. Ix?af-blados oblong to ov.-itr-nM.mi:. rt.-vliv : 

 Wtwcen 1 and I.. 1 ) mm. long: c:ijisul<"< .!!!. broadly oviii.l 



globose-ovoid, less than 2 mm. long. ('onstal sand-dunes. 



