308 FLORA Of TEXAS, 



slender, bilabiate. Banks of rivers ; corolla 1' long, bright 

 yellow; the 4-cleft limb nearly as long as tlie tube. 



L. PARVIFLORA, Lam. Smooth; stem twining; leaves 

 elliptical, glaucous beneath, all more or less connate ; 

 whorls of flowers crowded, peduncled ; corolla short, bi- 

 labiate, gibbous at the base ; stamens hairy below. Moun- 

 tains. Corolla 8"-10" long, yellow and purplish. 



TRIOSTEUM, L. Feverwort. 



Calyx ovoid, with 5 leafy linear-lanceolate persistent 

 lobes ; corolla tubular, equally 5-lobed, rather longer than 

 the calyx ; stamens 5 ; ovary 3-celled, with a single ovule 

 in each cell ; fruit a dry drupe containing 3 bony nutlets. 

 — Perennial hairy herbs, with large leaves, narrowed but 

 connate at the base, and sessile axillary /o76;ers. 



T. PERFOLIATUM, L. Stem soft-hairy ; leaves oval, acu- 

 minate, entire, hairy above, tomentose beneath ; floivers 

 commonly clustered, brownish purple. Shady woods. Stem 

 2°-4° high; leaves 4'-7' long. 



SAMBUCUS, Tourn. Elder. 



Calyx-hhes minute or none; corolla rotate, 5-lobed; 

 stamens 5 ; fruit a globular baccate drupe, containing 

 three 1-seeded nutlets. — Shrubs, with pinnate leaves, and 

 yfhite floivers, in ample terminal cymes, 



S. Canadensis, L. Leaflets 7-11, oblong, serrate, 

 smoothish, acute, the lower ones often 3-parted ; cymes 

 flat, 5-parted ; fruit black. Low grounds, common. Stefii 

 4°-16° high, the straight young shoots with large pith. 



S. PUBENS, Michx. Leaflets 5-7, oblong, serrate, pubes- 

 cent beneath; cymes paniculate, pyramidal; frnit red. 

 Mountains. Shrub 6°-10° high ; cymes smaller than in 

 the last 



