130 



FAM. 159. 



R. sarmentosa (multiflora) . Leaves opposite, ovate, acuminate, serrate-crenate ; 

 flowers verticillate in terminal racemes. 



10. Corolla rotate, 4-cleft, white or yellow, or blue; — herbs, sometimes 

 shrubby, with the flowers solitary in the axils; sepals 4-5, near- 

 ly distinct; stamens 4, nearly equal, - Scoparia 



S. dulcis. Leaves ovate to oblong-oblanceolate; corolla small, white; its lobes 

 oval or suborbicular. Sand. Summer. 



10. Corolla rotate-campanulate, 5-lobed, yellow; stamens nearly equal; — 

 much branched herbs with pinnately parted leaves and the 

 flowers solitary in the axils; calyx-lobes 5, longer than its tube; 

 style long-exserted. ______ Afzelia (Seymeria) 



A. (S.) pectinata. Stems viscid-pubescent, branched; calyx and corolla pubes- 

 cent. Dry sandy soil. Summer and Fall. 



10. Corolla campanulate, 5-cleft, yellow; stamens didynamous; — herbs 

 with toothed or pinnatifid leaves; flowers in bracted racemes or 

 panicles, ______ Dasystoma, False Foxglove 



D. pectinata. Leaves lanceolate to ovate, 1-2 pinnatifid, segments finely toothed 

 or incised; calyx densely glandular-hirsute, the segments toothed or pin- 

 natifid; corolla widely dilated. Sandy soil. Summer. 



169. Acanthaceae, Acanthus Family. 



Chiefly herbs with simple, exstipulate leaves and 

 bracted flowers; calyx 5-parted; corolla 2-lipped or almost 

 regularly 5-lobed; stamens 4 didynamous, or 2 with or 

 without another pair of abortive stamens (ruellias have 

 sometimes 5 stamens); ovary free, 2-celled, with single 

 style and 1-2 stigmas; fruit a 2-celled capsule, 4-several 

 seeded. 



1. Normal leaves only at the base of the stem, or crowded at the ends of 

 the branches; — flowers in dense spikes; corolla more or less 2- 

 lipped, white or blue; stamens 2, Tubiflora (Elytraria) 



T. Carolinensis (E. virgata). Stems scape-like, covered with alternate scales, 

 the basal leaves oblong to spatulate, or linear; calyx-lobes bearded at the 

 tips; corolla-lobes nearly equal, white. Riverbanks. Summer. 



1. Normal leaves on the stem; — corolla funnel- or salverform, lobes 



5, somewhat unequal; stamens 4 or 5, - - - - - - 2 



2. Calyx-lobes bristle- like; anthers pointed at the base; ovules 2 in each 



cell; — leaves opposite; flowers solitary or clustered in the axils; 

 corolla-tube slightly curved, limb somewhat 2-lipped, - Calophanes 



C. humistrata. Leaves few, oblong, with petioles shorter than the blades; calyx 

 puberulent; corolla white. Low pine-land. Spring. 



C. oblongifolia. Leaves oblong or the lower obovate, sessile or short-petioled, 

 calyx hirsute; corolla blue with purple spots. Sandy pine-land. Spring 

 to Fall. 

 2. Calyx-lobes linear or lanceolate; anthers not mucronate; ovules 3-10 

 in each cell; — leaves opposite; flowers solitary or clustered in 

 the axils or in terminal cymes or panicles; corolla- lobes some- 

 what unequal. Spring and Summer. _____ Ruellia 



