440 FLORA OF TEXAS. 



Stem l°-3° high, with angled branches; leaves 2-5' long, 

 decurrent on the petiole; corolla white in the throat; 

 fruiting calyx 5-angled, inclosing the globose beny. 



DATURA, L. Jamestowi?^-weed ; Thorn-apple. 



Calyx tubular, terete or angled, 5-cleft, separating near 

 the base, the upper portion deciduous; corolla funnel- 

 shaped, the limb plaited, 5-lobed, convolute in the bud; 

 stamens 5 ; anthers opening lengthwise ; capsule spin}^ 

 imperfectly 4-celled, 4-yalved, many-seeded. — Strong-scent- 

 ed poisonous herbs, with petioled oblong or ovate mostly 

 toothed leaves, and large ^oWt^rj fiowers in the forks of the 

 branches. 



D. STRAMONIUM, L. Smooth; stem stout, forking; 

 leaves ovate or oblong ovate, acute, sinuate-toothed; co- 

 rolla sharply 5-toothed, white, twice as long as the 5-angled 

 calyx ; capsule erect. — Var., Tatula. Larger ; leaves often 

 cordate ; stem and corolla purplish. — Waste ground, very 

 common. June-October. Stem l°-3° high; leaves 4-8' 

 long; corolla 3 -4' long. 



D. Metel, L. Pubescent; stem stout, branching; leaves 

 ovate, entire or slightly toothed ; corolla white, 10-toothed ; 

 calyx loose, terete; capsule nodding. Stem 3°-4° high; 

 leaves 6-8' long; corolla 6' long. 



ThQ Night-blooming Jessamine (Ce^irwrn), Tobacco (Nico- 

 tiana), and Petunia, belong to the Nightshade Family. 



93. GENTIAIS^ FAMILY. Order, Gentianace^. 



Chiefly smooth and bitter herbs, with colorless juice, 

 opposite entire partly sheathing exstipulate leaves, and 

 regular often showy flowers ; calyx 4-12-parted, or 4-12- 

 cleft ; corolla 4-12-lobed, convolute, rarely valvate or imbri- 

 cated in the bud, hypogynous ; stamens alternate with the 



