SAXIFRAGACEZ, (SAXIFRAGE FAMILY.) 57 
4. TIARELLA, L, 
Distinguished by the minute, slender petals, long exserted stamens, and the very une- 
qual horns of the 2-carpeled ovary. 
1. TT. unifoliata, Hook. Somewhat hairy; flowering stems 4 to 15 inches high, 1-3- 
leaved; leaves thin, cordate, 3-5-lobed, crenate-toothed; flowers small, panicled. 
: 5. HEUCHERA, L. Atvum-Roor. 
Calyx tube coherent with the lower half of the ovary. Petals small, entire, clawed. 
Ovary more or less 2-beaked; the beaks tapering into either filiform long, or subulate 
shorter styles.—Herbs with small, dull-colored paniculate flowers. Scarious stipules 
adnate or distinct. Leaves round-cordate, obtusely lobed, crenate-toothed. 
1. H. micrantha, Dougl. Scape, or few leaved flowering stems, a foot or two 
high; leaves 2 to 4 inches in diameter; calyx acute at the base, lobes erect; styles 
slender. 
2. H. pilosissima, Fisch. & Mey. Very villous-pubescent or hirsute, with viscid 
hairs; calyx rounded or obtuse at the base, the broad, short lobes incurving, densely 
hairy; styles short. 
6. PHILADELPHUS, L. Mock Orance. 
Calyx adhering to the ovary nearly or quite to the summit, persistent. Petals 4 or 5, 
large, obovate or roundish. Stamens 20 to 40. Styles 3 to 5, united at the base or 
nearly to the top.—Shrubs with opposite leaves and showy white flowers. 
1. P. Gordonianus, Lindl. Six to twelve feet high; leaves ovate to oblong-ovate, 
mostly coarsly-serrate, 2 to 4 inches long; flowers in loose clusters, which are leafy at the 
base; petals frequently an inch long. 
7. WHIPPLEA, Torr. 
Calyx lobes thin, white or whitish. Petals ovate or oblong. Ovary 3 to b-celled. 
Styles distinct, subulate.—Small, trailing or diffuse, ours half shrubby plants, with 
opposite, short petioled, 3-ribbed leaves, no stipules and small white cymose-clustered 
flowers; peduncles naked, terminal. 
1. W. modesta, Torr. Leaves membranaceous, ovate or oval, obtusely few-toothed 
or entire, an inch or less long. Flower 2 lines long, clusters close-flowered, fragrant. 
8, RIBES, L. 
Ualyx tube adnate to the globose ovary and extended beyond it, the limb commonly 
petaloid. Petals erect, mostly smaller than the calyx-lobes. Stamens alternate with 
the petals. Berry crowned by the withered remains of the flower. — Shrubs with 
alternate palmately lobed leaves. 
