Mitella. SAXIFRAGACE^E. 199 



Exp. 95. Litlwphragma tenella & L. glabra (a smoother form), Xutt. in Torr. 

 & Gray, Fl. i. 584 ; Gray, 1. c. 



Ttocky moist ground, through the northern portion of the Sierra Nevada ; thence to the Rocky 

 Mountains. Calyx 1 or 2 lines long. Petals 2 or 3 lines long, generally pink or rose-color. 

 Granulate bulblets copious at the root, and sometimes in the place of (lowers in the raceme. 



6. TIARELLA, Linn. 



Calyx 5-partcd ; the base almost free from the ovary, the lobes more or less 



colored. Petals 5, undivided, small, with short claws. Stamens 10 : filaments long 



and slender: anthers with 2 parallel cells. Ovary 1-celled, compressed, 2-horned 



(the horn's or lobes tapering into long filiform styles), soon unecpaal and dehiscent, 



one valve or carpel in fruit lanceolate-elongated, the other remaining very much 



shorter. Seeds rather few and only at the base of each parietal placenta, globular, 



with a smooth and shining crustaceous coat. — Perennial low or slender herbs, often 



multiplying by summer runners ; with palmately lobed or divided alternate leaves, 



and sometimes scaly stipules at the base of the petiole, and a terminal raceme or 



panicle of small white flowers. 



A North American and North Asiatic genus of five species, one inhabiting the Atlantic States 

 and two the Pacific coast. 



1. T. unifoliata, Hook. Somewhat pubescent or hairy : flowering stems a span 

 to a foot "t more long : leaves thin, cordate, either rounded or somewhat triangular, 

 3 — 5-lobed and the lobes crenate-toothed ; the radical ones slender-petioled ; the 

 cauline mostly one, smaller, and short-petioled, or sometimes (mainly on decumbent 

 and later flowering shoots) 2 or 3 similar to the radical: panicle raceme-like and 

 Loose: petals small and inconspicuous, almost filiform. — Fl. i. 23S, t. 81. Heuc/tera 

 longipetala, Moeino, Ic. Ined. t. 423. 



Shaded ravines and woods, San Mateo f'o. {Kellogg), Mendocino Co. (Bolander), and north 

 through British Columbia. The Californian and some of the more northern specimens incline to 

 have elongated and 2-3-leaved flowering stems, and whole plant more hairy, the var. procera. 

 but this is merely a luxuriant state. The lobing of the braves varies, SO that it may pass i 



T. trifoliata, Linn. (T. stenopetala, Presl), which extends from the mountains of Oregon to 

 Alaska and X. W. Asia, has most of its leaves divided into three distinct leaflets. 



7. MITELLA, Tourn. Mitre-wort. 



Calyx short; the broad tube coherent with the base of the ovary and dilated 

 beyond it, 5-lobed ; the lobes valvatc in the bud, spreading. Petals 5, inserted on 

 the throat of the calyx, very slender, pinnately parted or 3-cleft; the divisions 

 almost capillary. Stamens 10 or 5, very short: anthers cordate 'or reniform, 2 

 celled. Ovary short and broad, 1-celled, with 2 parietal or almost basal placentae, 

 mainly or partly superior: styles 2, very short : stigmas capitellate. Capsule glob- 

 ular or depressed, hardly at all lobed, opening across the broad summit. Seeds 

 several to each placenta, obovate, with a firm and smooth black and shining close 

 crustaceous coat. — Small perennials (X. American ami X. E. Asian); with more or 

 less creeping slender root -docks and summer runners, small and greenish or some- 

 times white flowers in a simple raceme, and cordate or roundrenit'oi in simple I 



which are all radical and long-petioled, or two or re on flowering stems, these In 



one species (of E. North America) opposite. Petioles, &c, mostly loosely hirsute. 



I . M. Breweri, ■ (ray, Leaves all in a cluster on the rootstock, round reniform. 

 creuate and crenately incised, of comparatively firm texture, s i nearly glabrous, 



