EUPHORBIACEAE. 2M 



seeds ovoid-globose, 3 X ---^ mm., painted, v>hite, foveolate ^vith numerous 

 large S'hallow irregular pits. 



In a sisal field on South ("aicos Island: — Ilispanidla ; Mona : I'(irt<> Ulco; 

 Culebra ; Vieques; St. Thomas: St. Jan; St. Martin; Ane^ada ; Tortijla ; Martinitiue 

 and Tobago. Broad-leaved Spurge. 



31. CHAMAESYCE S. F. Gray, Nat. Arr. Brit. PI. 2: 200. 1,S21. 



Annual or perennial herbs or shrubs, the stems often diffuse at the base; 

 the branches prostrate or ascending, forking. Leaves opposite, inequilateral, 

 more or less oblique at the base, entire or toothed ; stipules minute, entire or 

 lacerate. Inflorescence solitary or capitulate, axillary and terminal ; involucre 

 toothed, glandular on the margin; glands 4, naked or appendaged (the 5th 

 gland represented by a s'ulcus in the margin of the involucral tube). Capsule 

 more or less globose, 3-coccous, the cocci sharply angled or rounded; seeds 

 minute, ovoid or elongated-ovoid, more or less quadrangular, the facets smooth 

 or transversely ridged. [Greek, ground fig.] About 225 species, widely dis- 

 tributed. Type species: Chamaesyce maritima S. F. Gray. 



Suffrutescent ; leaves thick, mostly entire. 

 Leaves ovate to elliptic or oblong. 



Inflorescence terminal-axillary ; plants glabrous. 1. C. huxifalia. 



Inflorescence throughout the upper axils. 

 Leaves glabrous. 

 Leaves entire. 



Stipules deltoid, acicular-bristled. 2. C. WHsoni. 



Stipules not bristled. 3. C. Icchcoides. 



Leaves dentate. 



Stipules broad, fimbriate-ciliate. 4. C. insulac-aalis. 



Stipules narrow, entire, aristate. 5. C. cxumcn.tis. 



Leaves densely tomentose. G. C. catfcnsis. 



Leaves canescent. entire. 7. C. Bracci. 



Leaves linear or narrowly oblong. 



Leaves 2-4 cm. long, involucres peduncled. S. C. artirulata. 



Leaves 8-12 mm. long, involucres sessile. 9. C. vayinulata. 



Herbaceous ; leaves thin, mostly serrate. 

 Leaves glabrous. 



Inflorescence clustered ; leaves oblong, acute, sharply 

 serrate. 

 Leaves broadly falcate; seeds red. 10. C. hi/pcririfoliti. 



Leaves narrowly falcate: seeds black. 11. C. bratiilittisi!^. 



Inflorescence solitary ; leaves ovate, blunt, dentate or 

 entire. 

 Capsule glabrous. 12. C. Dlodfjvttii. 



Capsule hairy on the angles. 13. C. prostrata. 



Leaves hairy. 



Inflorescence clustered. 



Leaves ovate to lanceolate, sharp-serrate, acute. 14. C. hirtn. 



Leaves ovate, crenate-dontate, obtuse. 1"). C. licrtvriana. 



Inflorescence solitarv : leaves orbicular to elliptic, en- 

 tire or apically denticulate. !»'•• C. lirittonit. 



1. Chamaesyce buxifolia (Lam.) Small, Fl. SE. U. S. TIL 1903. 



Euphorbia huxifoUa Lam. Encyc. 2: 421. 1788. 



Low, generally erect, glabrous, shrubby, fleshy, 2-5 dm. high; branches 

 usually many. Leaves glabrous, thick, wrinkling in drying, ovate or broadly 

 oblong, 8-12^nm. long, obliquely siibcordate at the base, acutish, margin entire, 

 involute; petioles about 1 mm.; involucres campanulate, about 1.5 mm., a^ long 

 as the peduncles or shorter; glands transver.soly oblong; api)endagos a mere 

 whitish bordering line; capsule broad, glabrous; seeds- white, ovoi.l-quadrang- 

 ular, somewhat apiculate, 1.2x1 mm-i the angles very blunt; facets very 

 shallowly broad-pitted by indistinct and irregularly anastomosing transverse 

 ridges. 



Maritime sands throughout the archipelago : — Bermuda ; Florida ; coasts of the 

 Gulf of Mexico and the Caribbean Sea. Coast SrritGE. 



