POLTPETALOUS EXOGENOUS PLANTS. 187 



muricate. Perennial. Stems G'-12' long. Floivers 

 purple. 



WALTHERIA, L. 



Invohicel 3-leaved, deciduous. Calyx 5-cleft. Petals 5, 

 spatulate, convolute in the bud. Stamens 5, united below. 

 Ovary 1-celled, 2-ovuled. Style single. Stigma penicil- 

 late or tuberculate. Capsxde 2-valved, 1-seeded. Embryo 

 in the axis of fleshy albumen. Herbs or shrubs with alter- 

 nate leaves, and small flowers in axillary clusters. 



W. Americana, L. Stems erect, villous ; leaves ovate 

 or oblong, acute or obtuse, serrate, plicate, tomentose on 

 botli surfaces ; heads of flowers globose, stalked or sub- 

 sessile and shorter than the petioles, the upper ones often 

 spiked. Calyx hirsute; flowers yellow. Stem 2°-3° high, 

 rigid. Leaves 1-2' long. 



MELOCHIA, Lin. 



Calyx 5-cleft, persistent, naked or with 1-3 bracteoles at 

 the base. Petals 5, spreading. Stamens 5, opposite the 

 petals, short, monadelphous at the base. Styles 5 ; stigmas 

 slightly clavate. Carpels united into a 5-angled, 5-celled 

 loculicidal capsule. Seeds 1-2 in each cell. Cotyledons 

 flat, foliaceous, reniform. Shrubby plants, with alternate 

 serrated leaves. Peduncles several-floAvered, terminal, ax- 

 illary, or opposite the leaves. Flo2cers violet or white. 



M. PYRAMID ATA. Leaves ovate-lanceolate, toothed, 

 glabrous ', peduncles 5-6-flowered, longer than the petioles; 

 petioles and branches pubescent. — Drummond. 



Between San Felipe and Brazos. 



25. LINDEN FAMILY. Order, Tiliace^. 



Trees, rarely herbs. Leaves alternate, with deciduous 

 stipules. Flowers axillary or extra-axillary, hypogynous, 



