EUPHORBIACEAE. 



237 



seeds ovoid-globose, 3 X 2.4 mm., pointed, white, foveolate with numerous 

 large shallow irregular pits. 



In a sisal field on South Caicos Island : Hispaniola ; Mona : Porto Rico : 

 Culebra ; Vieques ; St. Thomas ; St. Jan ; St. Martin ; Anegada ; Tortola ; Martinique 

 and Tobago. BROAD-LEAVED SPURGE. 



31. CHAMAESYCE S. F. Gray, Nat. Arr. Brit. PI. 2: 260. 1821, 



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 sulcus 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. 

 Inflorescence throughout the upper axils. 

 Leaves glabrous. 

 Leaves entire. 



Stipules deltoid, acicular-bristled. 

 Stipules not bristled. 

 Leaves dentate. 



Stipules broad, fimbriate-ciliate. 

 Stipules narrow, entire, aristate. 

 Leaves densely tomentose. 

 Leaves canescent, entire. 

 Leaves linear or narrowly oblong. 



Leaves 2-4 cm. long, involucres peduncled. 

 Leaves 8-12 mm. long, involucres sessile. 

 Herbaceous ; leaves thin, mostly serrate. 

 Leaves glabrous. 



Inflorescence clustered ; leaves oblong, acute, sharply 



serrate. 



Leaves broadly falcate ; seeds red. 

 Leaves narrowly falcate ; seeds black. 

 Inflorescence solitary ; leaves ovate, blunt, dentate or 



entire. 



Capsule glabrous. 

 Capsule hairy on the angles. 

 Leaves hairy. 



Inflorescence clustered. 



Leaves ovate to lanceolate, sharp-serrate, acute. 

 Leaves ovate, crenate-dentate, obtuse. 

 Inflorescence solitary ; leaves orbicular to elliptic, en- 

 tire or apically denticulate. 



1. C. buxifolia. 



2. C. Wilsoni. 



3. C. lecheoides. 



4. C. msulae-salis. 



5. C. exwnensis. 



6. C. cayensis. 

 1. C. Bracei. 



8. C. articulata. 



9. C. vaginulata. 



10. C. hypericifolia. 



11. C. Irasiliensis. 



12. C. Blodgettii. 



13. C. prostrata. 



14. C.hirta. 



15. C. Berteriana. 



16. C.Brittonii. 



1. Ohamaesyce buxifolia (Lam.) Small, Fl. SE. U. S. 711. 1903. 

 Euphorbia buxifolia 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 mm. long, obliquely subcordate at the base, acutish, margin entire, 

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

 as the peduncles or shorter; glands transversely oblong; appendages a mere 

 whitish bordering line; capsule broad, glabrous; seeds white, ovoid-quadrang- 

 ular, somewhat apiculate, 1.2 X 1 mm., 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 SPURGE. 



