SAXIFRAGES. 123 



and crenate: stem 1 2^ ft. high, naked or few-leaved, rather densely and 

 thyrsoidly paniculate: calyx densely hairy, subglobose, the tube rounded, 

 the lobes incurved: filaments and narrowly spatulate petals little exserted. 

 Var. Hartwegi, Wats. Stems 23 ft. high: panicle more open; the 

 whole plant, and especially the calyx, less hairy. In the Coast Range, 

 and apparently not common; at all events seldom seen. 



6. PAR1VASSIA, Tourn. Glabrous stemless perennials, with entire 

 petioled exstipulate leaves and simple 1-flowered scapes. Calyx 5-parted; 

 the base free from or adnate to the base of the ovary. Petals 5, oval or 

 oblong, imbricate in bud, white, with conspicuous green veins, widely 

 expanding, tardily deciduous. Stamens 5, alternating with the petals, 

 and with as many clusters of short gland-tipped sterile filaments. Ovary 

 ovate, 1-celled, with 3 or 4 parietal placentae; stigmas as many, closely 

 sessile each directly over its corresponding placenta. Capsule 3 -4-valved 

 from the apex, the valves placentiferous in the middle. 



1. P. Californica, Greene. Radical leaves ovate or ovate-oblong, 

 1 2 in. long, tapering from the broad and sometimes slightly rounded 

 base to a long or short petiole : scapes 1 2 ft. high, the very small sessile 

 but not clasping leaf borne much above the middle: petals oval or 

 obovate, sessile, entire, % in. long: sterile filaments about 20 in each set, 

 united to the middle, each tipped with a conspicuous antheroid protu- 

 berance. In the mountains above New Almaden, /. Burtt Davy. 



7. WHIPPLEA, Torrey. Slender diffuse hairy undershrub, with 

 short-petioled leaves, and terminal naked-peduncled clusters of small 

 white flowers. Calyx white like the petals, 5-clef t : tube adnate to lower 

 part of the ovary. Petals 5, ovate or oblong, narrowed at base. Stamens 

 usually 10; filaments subulate. Ovary 3 5-celled, with a single ovule 

 in each cell; styles distinct; stigmas introrse. Capsule septicidally 

 parting into distinct cartilaginous 1-seeded portions which open ventrally 

 only. Seeds oblong, with a short obtuse appendage at each end. 



1. W. modesta, Torr. Stems 1 ft. long or more: leaves thin, ovate 

 or oval, somewhat toothed or entire, 1 in. long or less : fl. 2 lines broad 

 or less: calyx tube nearly hemispherical: capsule globular; styles decid- 

 uous from it. Borders of thickets, or in deep woods, in the Coast Range. 



8. RIBES, Fuchs. Shrubs, with alternate palmately lobed often 

 resinous -glandular or viscid leaves; the stipules when present adnate to 

 the petiole. Flowers racemose (rarely solitary) on short leafy shoot- 

 from lateral buds; pedicels subtended by a bract and usually bibracteo- 

 late about midway. Calyx-tube adnate to the globose ovary and more or 

 less produced above it, 5-lobed (4-lobed in n. 9), the lobes commonly 

 spreading or reflexed, usually colored. Petals 5, mostly smaller than 

 the calyx-lobes, inserted in or near the sinuses. Stamens 5, alternate 



