270 SAXIFEAGAOE^. 



1. T. affinis Gray Boland. "Stab of Bethlehem." Stems 9 

 to 16 in. high, hispidulous, the hairs spreading and glandular; radical 

 leaves roundish in outline and crenately lobed, varying into the 

 <;auline; cauline mostly parted into 3 broad divisions which are deeply 

 incised or merely toothed; pedicels about equaling the turbinate 

 calyx; raceme 7 to 10-flowered; petals mostly 3-toothed at apex, the 

 central lobe rather larger; ovary half inferior, the styles and placentae 

 commonly 3, as also in the next. 



Common in mostly open ground from San Bernardino northward 

 ■throughout the state. Mar.-Apr. 



2. T. heterophylla H. & A. Herbage hirsute- or somewhat 

 scabrous-pubescent; stems 1 to 2 ft. high; radical leaves roundish, 

 crenately lobed, J- to IJ in. broad, the cauline very variable but 

 mostly 3-parted with the divisions incised or toothed; calyx campanu- 

 late, truncate or rounded at base; petals with a stout tooth on each 

 side. 



Shady ground, rather common; Coast Ranges. Apr. Var. 

 BoLANDEKi (T. Bolanderi (Gray) Boland.); petals entire or rarely with 

 a small lateral tooth on each side. 



3. T. grandiflora (Dougl.) Pursh. False Alum Eoot. Hirsute 

 with spreading hairs, especially the stems and petioles, IJ to 2J- ft. 

 high; leaves roundish in outline, cordate at base, shallowly 3 to 

 5-iobed, serrate or crenate, 2 to 4 in. broad, the radical on petioles 2 

 to 9 in. long; raceme elongated, many-fiowered; pedicels shorter than 

 the (3J lines long) flowers; calyx 10-nerved, inflated-campanulate, 4 to 

 5 lines long, enclosing and adherent to the lower J of the capsule; 

 petals at first greenish white, changing to pink or red, the upper por- 

 tion laciniately cleft into subulate segments, the lower portion toothed; 

 filaments scarcely as long as the anthers; ovary with 2 parietal 

 placentas alternate with as many styles. 



Woods from Santa Cruz, San Francisco, Oakland Hills, and Ala- 

 meda northward. One of the plants which follows very closely the 

 distribution of the Eedwood. Apr. -May. Sometimes called Fringe- 

 cups. 



4. TIARELLA L. False Mitre-wokt. 



Perennial herbs with white flowers in a terminal raceme or panicle. 

 Calyx almost free from the ovary, its lobes ovate, more or less colored. 

 Petals small, with short claws. Stamens 10, long and slender. 

 Ovary 1-celled, compressed, 2-horned, the horns tapering into the 

 long filiform styles. Capsule membranaceous, early dehiscent; valves 

 unequal, one becoming elongated, the other remaining short. Seeds 

 few a;t the base of each parietal placenta. (Diminutive of the Greek 

 tiara, a high cap, in allusion to the pistil.) 



1. T. unifoliata Hook. Stems sparingly leafy, usually several 

 from the base, f to 2 ft. high; leaves roundish or somewhat ovate in 

 outline, 3 to 5-lobed, cordate at base, IJ to 4 in. broad, the lobes 

 crenate; cauline leaves 2 or 3; radical leaves long -petioled (3 to 9 in.); 

 panicle 3 to 9 in. long; petals almost filiform, inconspicuous. 



