306 FLORA OF TEXAS. 



petioled; floioers very numerous, crowded in axillary 

 (wliorled) and terminal spikes; stamens long-exserted ; 

 corolla white or purple. Stem 2°-4'' high ; leaves 2-4' long. 



** stem-leaves opposite; corolla wheel-shaped; capsule obcordate. 

 tt Flowers scattered, in leqfy terviinai racemes. 



V. SERPYLLiFOLiA, L. Perennial, smoothish; stem as- 

 cending, diffusely branched ; leaves oval or roundish, cre- 

 nate, short-petioled, the floral ones lanceolate and entire; 

 pedicels as long as the calyx ; corolla blue. Stem 4'-6' 

 long; leaves 4"-6" long. 



V. PEREGRINA, L. Annual, smooth; stem erect, simple 

 or branched; leaves sessile, oblong, toothed, the lowest 

 narrowed into a petiole, the floral ones entire; peduncles 

 shorter than the calyx ; corolla white, minute. Stem 2-12' 

 high; leaves ^'-V long. 



CAPRARIA, L. 



Calyx 5-parted, equal ; corolla bell-shaped, equally 5-lobed, 

 smooth within ; stamens 4-5 ; anthers sagittate ; style slen- 

 der; stigma thick, ovate, at length 2-lobed; capsule coria- 

 ceous, ovate, septicidally 2-valved, the valves 2-cleft at the 

 apex; seeds numerous, reticulate. — Perennial herhs or 

 shrubby /?/^;i^5; leaves alternate, serrate; 2^6duncles axil- 

 lary, single or by pairs, mostly tl-flowered. 



C. BIFLORA, L. Shrubby, smooth or pubescent; stem 

 erect, branching; leaves lanceolate or oblong, sharply ser- 

 rate, narrowed and entire below the middle; peduncles 

 filiform, mostly by pairs,. shorter than the leaves; calyx- 

 lobes linear; corolla deeply 5-cleft; stamens 5, included. 

 Stem 2°-3° high; leaves I'-l^' long; floioers white? 



BUCHNERA, L. 



Calyx tubular, 5-toothed ; corolla salver-shaped, 5-lobed, 



