CISTACEAE ■ 795 



3. Piriqueta tomentosa H.B.K. Pubescent with stellate tomentum. Stems erect 

 or decumbent, 2-4 dm. tall, simple or branched, leafy: leaf -blades leathery, oval, oblong 

 or rarely narrowly oblong-lanceolate, 1-4 cm. long, obtuse, slightly crenate-serrate, ses- 

 sile or short-petioled below: calyx turbinate or campanulate-turbinate: lobes lanceolate, 

 5-8 mm. iong, acute, slightly spreading : petals yellow, obovate, about 1.5 cm. long : cap- 

 sules subglobose, 5-6 mm. in diameter, minutely pubescent: seeds fully 2 mm. long. 



In pine lands, peninsular Florida. 



4. Piriqueta Carollniana (Walt.) Urban. Pubescent with fulvous hirsute hairs and 

 stellate tomentum. Stems erect, 1-4 dm. tall, simple or sparingly branched : leaf -blades 

 obovate, oblong or cuneate, lanceolate, or rarely oval, 1-7 cm. long, obtuse, repand or 

 crenate-serrate, sessile or with short petioles: pedicels shorter than the peduncles: calyx 

 turbinate; lobes lanceolate, 8-10 mm. long, acute, slightly spreading: petals yellow, 

 obovate, 1.5-2 cm. long: capsules subglobose, 5-7 mm. in diameter, minutely pubes- 

 cent : seeds fully 2 mm. long. 



In pine lands, North Carolina to Florida and Alabama. 



2. TtTRNERA L. 



Shrubs or shrubby plants, with glabrous or pubescent foliage. Leaves few, alter- 

 nate : blades entire, toothed or pinnatifid. Flowers solitary in the axils, or sometimes in 

 clusters or racemes, with or without bractlets. Sepals 5, more or less united, imbri- 

 cated. Petals 5, usually yelloW, convolute, inserted at the throat of the calyx-tube. 

 Stamens 5, inserted near the petals. Filaments somewhat flattened, distinct. Anthers 

 2'-celled. Stigmas 3, brush-like. Capsule barely elongated, 3-valved. Seeds curved, 

 with a pitted or rough testa. 



1. Turnera aphrodisiaca Ward. A low diffuse shrub, with strigose foliage, or glab- 

 rate. Leaves appj-oximate or clustered on the branchlets; blades spatu.ate or oblong- 

 spatulate, leathery, 1-2.5 cm. long, acute, coarsely few-toothed, narrowed into slender 

 (petioles, the nerves prominent beneath, impressed above: caljTc 4 mm. long, sessile, 

 tubular ; lobes oblong or ovate-oblong, shorter than the tube, tips recurving : petals yel- 

 low, 6-8 mm. long, narrowly cuneate: capsules ovoid, 4-6 mm. long. 



In dry soil, southern Texas and adjacent Mexico. 



Family 9. BIXACEAE Reicbenb. Bixa Familt. 

 Shrubs or small trees. Leaves alternate : blades simple, toothed, lobed or 

 rarely entire. Flowers perfect, solitary or several to many and variously dis- 

 posed. Calyx of 4—5 usually imbricated sepals. Coi'oUa wanting', or of as many 

 petals as the sejials, deciduous*. Androecium of numerous or rarely few^ stamens. 

 Anthers opening by apical chinks. Gynoecium of 2-several vinited carpels. 

 Ovary superior, 1-celled, with 2-several parietal placentae which are sometimes 

 well intruded. Styles as many as the jjlacentae, but united. Ovules 2-many on 

 each placenta. Fruit a valvate capsule, the valves bearing the lalaeentae. 

 Seeds numerous, often hairy. 



1. AMOREUXIA MoQ & Sess. 



Branching shrubs. Leaves alternate : blades palmately lobed. Flowers in terminal 

 panicles. Sepals 5, deciduous. Corolla, showy. Petals 5. Stamens numerous: anthers 

 narrow. Ovary 2-celled by the meeting of the placentae. Ovules numerous. Capsule 

 locu'lieidally 3-valved, the valves leathery, separating from the endoearp and scarious 

 partitions. Seeds numerous, smooth, the bony testa surrounded with a membranous coat. 



1. Amoreuxia Wrightli A. Gray. Stems solitary or several from a stout base, 2-5 

 dm. tall: leaf -blades 2.5-5 cm. broad, deeply 5-7-lobed, the lobes mainly obovate, regu- 

 larly toothed: sepals 1.5-2 cm. long: petals twice as long as the sepals, orange above the 

 brownish base: capsules ovoid to oblong-ovoid, mainly 4-5 cm. long: seeds obovoid. 



On dry or stony hills, Texas to Arizona and Central America. Spring to fall. 



Family 10. CISTACEAE Lindl. Rock-rose Family. 



Shrubs or low woody herbs, with erect or spreading stems. Leaves alternate 

 or opposite : blades simple. Flowers regular, generally perfect, solitai-y, race- 



