194 SAXIFKAGE.E. 



with the base of the ovary and dilated above it ; lobes valvate in bud, 

 spreading in flower. Petals 5, inserted on the dilated throat of the calyx, 

 pinnately i)arted or palmately 3-cleft, their divii^ions, in the first group, 

 almost capillary. Stamens 10 or 5, very short ; anthers cordate or reni- 

 form, 2-celled. Ovary short and broad ; becoming a globular or depressed 

 capsule opening across the summit. 



* Petals green, pinnately parted, 



1. .M. Breweri, Gray, Proc. Am. Acad. vi. 533 (1865). Leaves short- 

 petioled, 2 — 3 in. broad, round-reniform, doubly and incisely crenate : 

 scape naked, a span high : calyx s^jreading, the limb with very shallow 

 lobes, or merely 5-undulate : stamens 5, alternate with the pectinate- 

 pinnatifid petals. — Forests of the middle and higher Sierra, from Mari- 

 posa Co. northward. 



2. M. ovalis, Greene, Pittonia, i. 32 (1887). Leaves thickish, 2 in. 

 long, oval or oblong, obtuse, cordate at base, with closed sinus, the mar- 

 gin with shallow crenate lobes and mucronulate teeth ; upper face 

 sparsely hirsute with curved hairs ; petioles ferruginous-hirsute with 

 deflexed hairs : scape 1 ft. high, glabrous or nearly so ; pedicels very 

 short : calyx-lobes short and broad : petals pinnately parted into 3 — 5 

 linear lobes : stamens 5. — Mendocino Co., Bolander. This, the M. tri- 

 fida of the "Botany of California," is very distinct from the plant of 

 Graham ; for that has deep calyx-lobes and trifid white petals. 



* * Petals white, pahnately trifid. 



3. M. (liversifolia, Greene, 1. c. Leaves thin, ovate or orbicular in 

 general outline, but with 3 or 5 shallow angular lobes, these entire, and 

 the whole margin ciliolate : scape 1 ft. high : calyx-lobes small, shallow, 

 whitish : petals white, cuneate-oblanceolate, palmately trifid at the 

 abruptly widened apex : stamens 5. — Summit of Trinity Mountains, near 

 lingering snow-drifts, July, 1886, C. C. Marshall. 



8. HEUCHERA, Linmeus (A-lvm-root). Perennial herbs, with leaves 

 and flowering stems from a short branching caudex, the former long- 

 petioled, palmately veined, roundish cordate, slightly lobed. Stems 

 somewhat scapiform, bearing few alternate reduced leaves and a panicle 

 or thyrse of cymose-dichotomous clusters of white or greenish or rose- 

 colored flowers. Calyx campanulate, 5-lobed, the tube cohei'ent with the 

 ovary below ; lobes obtuse, imbricate in bud. Petals 5, small, entire. 

 Stamens 5, alternate with the petals ; anthers 2-celled. Capsule 1-celled, 

 with 2 parietal placentae ; 2-beaked, dehiscent between the beaks. Seeds 

 horizontal, oval, muriculate or hispidulous. 



1. H. rubescens, Torr. Stansb. Rep. 388. t. 5 (1853). Leaves thickish, 

 1 in. broad or less, crenately lobed and toothed : scape 6 ^10 in. high, 



