4 RANUNCULACE.E. Anemone. 



Lawrence. It differs from A. alinna of Europe and the Caucasus in its more finely and narrowly 

 dissected leaves, with the lateral primaiy divisions not long-petiolulate, and in its lengthened 

 receptacle, which in the Old World species is small and hemispherical, even in fruit. 



* * Styles short and nearly naked, not becoming elongated. — Anemone proper, 

 -i- Carpels very numerous, in a close head, densely villous. 



2. A. multifida, DC. Alpine or subalpine, somewhat silky-villous : stems 3 to 

 15 inches high, 1 - 3-iiowered : radical leaves long-petioled, nearly semicircular in 

 outline, ternate, the sessile divisions deeply lobed with cleft linear segments : invo- 

 lucral leaves similar, shortly petioled : sepals 5 to 8, red or whitish, 4 to G lines long, 

 villous externally : receptacle oblong, the head in fruit globular to oblong, 5 to 12 

 lines long : akenes very densely woolly, ovate-oblong, Avith a straight beak. 



Sierra Co. (Lemmon) ; on the Columbia (Douglas) ; and frequently in the mountains eastward, 

 ranging to the Saskatchewan, Lake Superior, and N. New York. Also South American. 



-5- -i~ Carpels fewer, pubescent only : stems 1- 



3. A. nemorosa, Linn. Smooth or somewhat villous : stems from a slender 

 rootstock, 3 to 12 inches high, without radical leaves : involucre of three petioled ter- 

 nate leaves, the divisions cuneate-oblong to ovate, incisely toothed or lobed, or the lat- 

 eral ones 2-parted, about an inch long : peduncle equalling the involucre : sepals 4 to 

 7, oval, white or pinkish : akenes 12 to 20, oblong, 2 lines long, with a hooked beak. 



Under redwoods near the coast {Bigelow, Bolander) ; Sierra Co. {Lcinmon) ; and northward to 

 the British Boundary. It is common on the eastern side of the continent, in Europe and N. 

 Asia. Popularly known as Wood- Anemone. 



A. DELTOiDEA, Hook. Fl. i. 6, t. 3, A., is a closely allied species in Oregon. It is 10 to 15 

 inches high, slender : radical leaves trifoliolate ; leaflets rhomboid, serrate : involucre of rhom- 

 boid or rhomboid-ovate and undivided leaves on very short petioles, serrate and sometimes 

 3-lobed. It has not yet been found in California. 



3. THALICTRUM, Tourn. 

 Sepals 4 to 7, either greenish or petal-like, imbricated in the bud. Petals none. 

 Pistils 4 to 15. Ovule suspended. Akenes in a head. — Perennial herbs with 

 alternate leaves which are 2 or 3 times ternately compound ; the leaflets stalked. 

 Flowers in corymbs or panicles. 



A genus of about 50 species, belonging mostly to northern climates. They are of delicate and 

 graceful habit. Our species are dioecious, and not abundant. 



1. T. Fendleri, Engelm. Dioecious: leaves 2-3-ternate; the leaflets usually 

 more or less 3-lobed, sometimes toothed or cut at the apex into several lobes, the 

 base entire, and varying in shape from cordate to cuneate : sepals broadly ovate : 

 filaments very numerous, slender : anthers pointed : carpels 5 to 15, compressed, 

 oblique, with about three ribs on each side, sometimes reticulated. — PI. Fendl. 5. 



Rocky or shaded places, Napa Valley and southward ; New Mexico and the Rocky Mountains. 

 The whole plant is smooth, erect, 12 to 30 inches high. Flowers in a terminal panicle. Leaflets 

 6 to 9 lines long and about as wide. 



T. occiDENTALE, Gray, Proc. Am. Acad. viii. 372, from Oregon to Montana, is very like 

 T. Fendleri, except in the akenes, which are nearly half an inch long, narrow, long-acuminate, 

 and less curved than in that. Perhaps to be found in N. California. 



4. MYOSURUS, Linn. Mouse-tail. 



Sepals 5, spurred at the base. Petals 5, linear, on a slender claw, with a pit at 

 its summit. Stamens 5 to 20. Akenes very numerous, crowded on a long and slen- 

 der spike-like receptacle. Seed suspended. — Very small annual herbs, with a tuft 

 of linear or spatulate entire radical leaves, and solitary flowers on simple scapes. 



