EUPHORBIACEAE. 241 



upper axils, campanulate, less than 1 mm. long, short-pedunculate, glabrous 

 without, eiliate at the throat within; lobes triangular; glands 4, slightly 

 stalked, orbicular to ovate, the fifth represented by a sinus with a roundc'l 

 fundus and flanked by two larger, nearly quadrilateral lobes; appendages 

 nearly as broad as the glands, entire or 2-3-erenate ; capsule bluntly tricoceous, 

 glabrous; seeds ovoid-quadrangular, pinkish or brownish, 1 X 8 mm., angles 

 prominent, facets slightly transversely ridged. 



On rocks, in sand and in pot-holes, from the southern coast of Great Bahama to 

 Ambergris Cay: Florida; Bermuda: Cuba: Jamaica: Caymans. Referred by Mrs. 

 Northrop and by Dolley to Euphorbia serpens Kth., and by Dolley again to Eu- 

 phorbia maculata L. Blodgett's Spcbge. 



13. Chamaesyce prostrata (Aiton) Small, Fl. SE. U. S. 713. 1903. 



Euphorbia prostrata Aiton, Hort. Kew. 2: 139. 1789. 



Annual, prostrate, more or less pubescent, or glabrate; stems branched 

 at the base; branches slender. .5-15 dm. long, forking. Leaves thin, oblong or 

 ovate, strongly oblique at the base, 4-7 mm. long, obtuse, more or less serrulate 

 toward the apex, minutely pubescent on both sides, petiolate ; stipules thin, 

 papyraceous, broadly deltoid, eiliate at the acute apex ; involucres glabrous, 

 axillary, minute; lobes elongate-triangular, eiliate on the margin; glands 4, 

 transversely oval, the fifth replaced by a small extra glabrous tooth on the 

 involueral margin; appendages about the width of the glands, finely many- 

 crenate ; capsule strongly tricoceous, glabrous except on the keels of the cocci 

 which bear a fringe of long hairs; seeds pink, elongated-ovoid-quadrangular, 

 pointed, 1 X -5 mm., strongly and sharply sculptured by numerous, strictly 

 transverse, ridges which include the angles. 



Grassy places on Now Providence and Grand Turk Island : Bermuda ; North 

 Carolina to Missouri and southward to Brasil and Peru ; West Indies. Prostrate 

 Spurge. 



^ 14. Chamaesyce hirta (L.) Millsp. Field Mus. Bot. 2: 303. 1909. 



Euphorbia hirta L. Sp. PI. 454 (ante). 1753. 

 Euphorbia piluUfera L. loc. cit. (post). 1753. 



Annual, prostrate or ascending, pubescent with amber-colored, multi- 

 cellular hairs; stems branching from the base, 1-4 dm. long, forking or simple. 

 Leaves ovate to oblong-lanceolate, more or less falcate, 1-3 cm. long; some- 

 times blotched with deep-red, strongly oblique at the base, acute, sharply 

 serrate above the middle, petiolate; stipules long cylindro-aristate, hairy; 

 involucres densely capitulate in peduneled clusters, turbinate; lobes large, 

 triangular, densely long-eiliate ; glands 4., stipitate, the fifth replaced by a 

 shallow, rounded sulcus in the involueral margin; appendages none: capsule 

 strongly 3-COCCOUS, with short crisped multicellular hair 1 -: seeds salmon-pink, 

 elongated-ovoid-quadrangular, .8 X -5 mm., the angles sharp, facets strongly 

 marked with numerous, mostly incomplete, transverse ridges. 



Rocks, path-sides and cultivated grounds. Andros and New Providence to 

 Inagua : Bermuda; Florida; Mexico; West Indies; Central America; American 

 and Old World tropics. Hairy SPURGE. 



15. Chamaesyce Berteriatia (Balbis) Millsp. Field Mus. Bot. 2: 303. 1909. 



Euphorbia Berteriana Balbis; Spreng. Syst. 3: 794. 1826. 



A low, prostrate or ascending, densely pubescent annual, with a clustered 

 terminal inflorescence. Leaves oblong-ovate, obtuse, 1-1.5 x .4 .6 mm., 

 strongly inequilateral and oblique at the base; obtusely or crenately denticu- 

 late; stipules c\ lindro-nristate with a broadened base, glabrous; inflorescence 

 corymbose at the apices of the smaller branchlets; involucres minute, oHong- 

 turbinate, glabrous below, long-ciliate -hairy at the throat without and within; 



