Flora of the Palousc Region 91 



globose, 1 -celled, with 2 parietal almost basal placentae, partly 

 superior: capsule globular or depressed, hardly at all lobed; seeds 

 several to each placenta. 



M. stauropetala Piper. Scapes naked, 30-50 cm. high, sparsely pubes- 

 cent below, minutely glandular above: leaves orbicular, indistinctly 5-lobed, 

 faintly crenate, reniform, with a narrow sinus, sparsely pilose and ciliate: 

 raceme one-sided, 6-12 cm. long, 10-25-flowered: flowers white, nearly ses- 

 sile: calyx-lobes oblong-ovate, crenulate, 3-nerved: petals twice as long as 

 the sepals, 3-parted for half their length into filiform lobes, the lateral lobes 

 divaricate. Thatuna Hills, in coniferous woods. 



149. PHILADELPHIA. 



Shrubs: leaves opposite, petioled, entire or toothed, ovate or 

 oblong, without stipules: flow r ers large, showy, white, solitary or 

 cymose-clustered: calyx-tube top-shaped, 4-5-lobed, adherent to 

 the ovary nearly or quite to its summit: petals 4-5, large, obovate 

 or roundish: stamens 20-40, on the disk: styles 3-5, more or less 

 united; ovary 3-5-celled, inferior; ovules numerous: capsule 3-5- 

 valved; seeds very numerous. 



P. lewisii Pursh. Shrubs 1-3 m. high, much branched above: leaves 

 ovate, acute or acuminate, entire or sparingly dentate, glabrous or nearly so, 

 2-4 cm. long; petioles short: panicles narrow, few-flowered, 5-10 cm. long: 

 calyx-lobes acute or acuminate, twice as long as the tube, densely pubescent 

 at the tips within: petals oblong, 1.5-2 cm. long: styles united for half their 

 length; stigmas narrow. A handsome shrub, rather rare except in Snake 

 River canyon. Flowers odorous. 



150. RIBES. 



Low sometimes prickly shrubs: leaves alternate, often fascicled, 

 palmately-veined and lobed; stipules adherent to the petiole or 

 none: flowers small, solitary or racemose, mostly terminating short 

 and 1-2-leaved axillary shoots: calyx-tube adherent to the globose 

 ovary and more or less extended beyond it, 5, rarely 4-cleft, com- 

 monly colored or petal-like: petals 4-5, small, perigynous: sta- 

 mens as many as the petals and alternate with them: styles 2, 

 more or less united; ovary 1 -celled; ovules few or numerous: berry 

 globose, fleshy, usually many-seeded. 



.Stems armed with spines and prickles. 



Calyx-tube saucer-shaped: berries bristly. R. i.acistkk. 



Calyx-tube eampanulate or cylindric: berries smooth. 

 Calyx-lobes narrow, longer than the narrow tube. 



R. XIYKl'M. 



Calyx-lobes shorter than the cylindric tube. R. COGNATUM. 



Calyx-lobes as long as the short broad tube. R. SAXOSUM. 

 Stems unarmed. 



Flowers yellow. R. UJREUM. 



Flowers whitish: leaves gummy. R. CEREUM. 



Flowers whitish: leaves pubescent. R. VISCOSISSIMUM, 



