238 EUPHOBBIAGEAE. 



2. Chamaesyce Wilsonii iMillsp. Field Mus. Bot. 2: 301. 1909. 



Prostrate, spreading, matted, purplish-cinereous; branches densely num- 

 erous, iifviry, divaricate. Leaves small, fleshy, ovate, 2-4 X 1.5-2.5 mm., ob- 

 liquely auriculate-cordate at the base, obtuse, the margin entire; petioles very 

 short; stipules deltoid, stifE-ciliate ; involucres solitary in the upper fork- 

 ings, cylindric-campanulate, short-pedicellate, the tube glabrous without, 

 densely crisped-pilose within; lobes aristate; glands 4, orbicular, convex, the 

 fifth represented by a large, triangular lobe; appendages rudimentary; styles 

 short; stigmas bilobed; capsule ovoid; cocci slightly carinate; seeds white, 

 ovoid-quadrangular, 1 X -7 mm., angles comparatively sharp, facets indistinctly 

 marked by low irregular transverse ridges. 



WJiite-lanas of Castle Island and Grand Turk. Endemic. Wilsox's Spurge. 



3. Chamaesyce lecheoides Millsp. Field Mus. Bot. 2: 301. 1909. 



Euphorbia lecheoides Millsp. Field Mus. Bot. 2: 163. 1906. 



Erect, shrubby, slender, profusely branching, grayish farinose, perennial, 

 2-3 dm. high; branches diffuse, diehotomous, the inferior internodes about 1 

 cm. long, the upper branchlets virgate, wiry. Leaves short-petioled, deltoid- 

 ovate, triangular-ovate or elliptic, 2.5-5 X 1-2.5 mm., abruptly attenuate at the 

 apex, the margin thickened and revolute; stipules broadly ovate, stiff- 

 eiliate; involucres solitary, turbinate, short-pedicellate, the tube glabrous 

 without, barbellate at the throat within; lobes triangular, acute, ciliate; 

 glands dark, flattened, orbicular, the face pock-marked; appendages minute, 

 fleshy, or obsolete; istigmas bifurcate to the middle; filaments barbellate; 

 capsule glabrous; seeds reddish-brown, ovoid-quadrangular (the ventral angle 

 iudistincit) , apiculate, .8 X -5 mm., the facets indistinctly transversely rugose. 



Scrub-lands of tlie southwest extremity of Watling's Island, IMariguana, Inagua, 

 South Caicos and Grand Turk to Salt Cay. Endemic. Pin-weed Spurge. 



4. Chamaesyce insulae-SEllls Millsp. Field Mus. Bot. 2: 395. 1914. 



Perennial, erect, 7-10 cm. high, from a densely nodular rootstock; 

 branches densely tufted, wiry, glabrous, the internodes 1.5-2 cm. long. Infio- 

 reseence solitary, terminal and terminal-axillary; leaves opposite, sareous, 

 glabrous, 2-4 X 1.5-3 mm., marked only by the thickish midrib, suboordate, 

 acute, entire or in the lowermost indistinctly denticulate, petioles about 1 mm. 

 often with a tuft of ciliae between the base and the stipule; stipules of many 

 forms from deltoid and entire through lanceolate, bifid, and lance-aristate to 

 a mere tuft of ciliae ; involucres campanulate, sessile or nearly so, the outer 

 surface smooth, the inner densely woolly; lobes triangular-aristate, densely 

 woolly on the inner recurved surface; glands transversely oval; appendages 

 greenish white, entire or nearly so, about the width of the glands; styles bifid 

 to half their length; capsule glabrous, strongly tricoccous; seed ovoid-quad- 

 rangular, 1 X •'^ mm., white, acute, the angles sharp (except the ventral), 

 facets smooth or with a few irregular indistinct ridges. 



Sands of Salt Cay (Cay Sal Bank). Endemic. C.vy Sal Spurge. 



5. Chamaesyce exumensis Millsp. Field Mus. Bot. 2 : 301. 1909. 



Perennial, 3 dm.-1.5 m. high, purplish- or greenish-cinereous; stem erect 

 or reclinate-prostrate ; branches strict, denuded below, the nodes somewhat 

 swollen ; branchlets subtenuous, divaricate. Leaves thick, ovate, .8-1.1 X -S-.S 

 mm., short-petioled, obliquely cordate, obtuse or acutish, entire or slightly and 

 remotely dentate near the apex; stipules aristate; involucres terminal and in 

 the upper forkings, turbinate, short-pedicellate, glabrous without, densely 

 barbellate within; lobes triangular, setaceous at the apex; glands 4 (the fifth 

 represented by a larger involucral lobe), ovate, plane; appendages white. 



