59 FLORA. 



the bractlets, the calyx slightly 2-3-lobed ; stamens 2 or 3, exserted. Pistillate tlowers 

 solitary in the axils of the lower bractlets; calyx 3-lobed. Capsule 2-lobed or 3- 

 lobed, separating into 2 or 3 two-valved carpels. [In honor of Dr. B. Stellingfleet, 

 an English botanist.] About 15 species, mostly of tropical America and the islands 

 of the Pacific Ocean. 



i. Stillingia sylvatica L. QUEEN'S DELIGHT. QUEEN-ROOT. (I. F. f. 

 2306.) A bright green slightly fleshy herb. Stem usually branched from the 

 base, 3-11 dm. tall. Leaves obovate, oblong or elliptic, i-io cm. long, serrate 

 with appressed teeth, often narrowed at the 2-glandular base, sessile; flowers 

 lemon-colored, subtended by small bracts furnished with saucer-shaped elands; 

 calyx cup-shaped; glandular disk none; capsule depressed, 1-1.5 cm - i n diameter, 

 3-lobed; seeds ovoid, 6 mm. long, light gray, minutely pitted and papillose, the 

 base flattened. In dry soil, Va. to Fla., Kans. and Tex. March-Oct. 



ii. EUPHORBIA L. 



Monoecious herbs (many tropical species shrubs), with alternate, opposite or 

 yerticillate leaves. Flowers borne in ipvoKicres. Sinuses of the involucres usually 

 bearing glands, naked or appendaged^ Staminate flowers scattered over the inner 

 surface of the involucre, consisting of a stamen jointed on a filament-like pedicel, 

 which is subtended by a minute bractlet supposed to represent a calyx. Pistillate 

 flower solitary, at the bottom of the involucre, at length usually exserted on a 

 stalk. Capsule 3-lobed, separating into 3 2-valved carpels. Seeds sometimes 

 caruncled, variously pitted, ridged or wrinkled. [Named in honor of Euphorbus, 

 King Juba's physician.] Species about 700, most abundant in the warmer parts of 

 the temperate zones. Besides the following, some 95 others occur in the southern 

 and western parts of N. Am. 



* Glands of the involucre with petal-like appendages, 

 f Leaves opposite, inequilateral, their bases more or less oblique. 

 \ Leaves entire: seeds smooth. 



Plants branched at the base, the branches prostrate. 



Seeds about 3 mm. long. i. E, polygonifolia. 



Seeds 1-2 mm. long. 



Leaves usually more than twice as long as Broad; seeds nearly terete, 



1,5 mm. long. 4. E. Geyeri. 



Leaves usually less than twice as long as broad; seeds obtusely 4-angled, 



,i mm. long. 5. E. serpens. 



Plants with an erect or ascending stem, branched above, the branches ascending. 

 Seeds nearly terete, 2 mm. long; leaves usually flat and straight. 



2. E. peialoidea. 

 Seeds 4-angled, 1.5 mm. long; leaves often involute and curved. 



3. E. Ntittallii. 

 \ J Leaves entire; seeds variously roughened. 



Plants glabrous. 13. E. Fendleri. 



Plants canescent. 14. E. lata. 



\ \ \ Leaves serrate or dentate; plants prostrate or spreading. 

 Herbage glabrous. 



Seeds faintly transversely ridged and pitted. 



Leaves of main branches mostly less than i cm. long; seeds gray. 



6. E. serpyllifolia. 



Leaves of main branches over i cm. long; seeds brown. 7. E. albicaulis. 

 Seeds strongly transversely ridged, not pitted. 8. E. glyptosperma. 



Herbage pubescent or puberulent. 

 Seeds gray or white. 



Leaves toothed at the apex; involucres campanulate; seeds pitted. 



12. E. sttctospora. 

 Leaves toothed nearly to the base; involucres turbinate ; seeds transversely 



wrinkled. 9. E. hirsuta. 



Seeds brown or black. 



Involucres not split. 10. E. maculata. 



Involucres split on one side. n. E. humistratd. 



\ % \ \ Leaves serrate or -dentate; plant erect or ascending. 15. E. nutans t 



f f Leaves opposite, equilateral, their bases not oblique. 



1 6. E. hexagondt 

 f f f Leaves alternate or scattered on the stem, except a whorl subtending the umbel. 



