191 FLORA OF TEXAS. 



tt Sterile stamens manifest. 



G. QUADRiDENTATA, Michx. Pubescent and somewhat 

 viscid; stem decumbent at the base, ascending, simple or 

 branched; leaves lanceolate, sessile, 4-toothed; peduncles 

 mostly longer than the leaves; corolla yellowish-white; 

 cajjside small, globose, much shorter than the linear unequal 

 calyx-lohes ; bracts minute. Stem 4:'-6' high; leaves ^ 

 long ; corolla 5" long. 



Gr. AUREA, Muhl. Smooth ; ston decumbent, creeping, 

 the flowering branches ascending, 4-angled ; leaves sessile, 

 oblong-lanceolate, slightly serrate; peduncles as long as the 

 leaves, or the upper ones longer; bracts as long as the 

 calyx; corolla bright yellow. Stem l°-2° long; leaves 

 ^'-V long; corolla 6" long. 



ILYSANTHES, Eaf. 



Calyx 5-parted, bractless ; corolla bilabiate*, the upper lip 

 short, erect, 2-cleft, the lower larger, spreading, 3-cleft; 

 fertile stamens 2, included, the two anterior ones sterile, 

 2-lobed, with one of the lobes tipped with a gland, the other 

 smooth, acute ; capsule ovate or oblong, as long as the calyx. 

 — Smooth annuals, growing in wet or muddy places. Stems 

 4-angled ; leaves opposite ; pedtmcles axillary, often reflexed 

 in fruit ; floioers small, purplish. 



I. GRATiOLOiDES, Benth. Stem erect, at length diffusely 

 branched; leaves lanceolate, oblong, or ovate, the lowest 

 narrowed into a petiole, the upper sessile, acute, obscurely 

 toothed or entire ; lower lyeduncles mostly shorter than the 

 leaves, the upper much longer, spreading ; corolla pale blue, 

 twice as long as the calyx ; capsule oblong, acute, scarcely 

 longer than the calyx. Stem 6-12' long ; leaves i'-l' long ; 

 corolla 3"-4" long. 



I. REFRACTA, Benth. Stem erect, very slender, forking ; 

 radical leaves tufted, oblong, obtuse, entire, narrowed at 



