1 UANUNCULACEJ;:. Aueinoue. 



I.uw..i..e. It ilillei-s IVoiu ./. uljnna of Europe aiui the Caucasus in its more liuely and narrowly 

 .lissected leaves, witli tlie lateral primary divisions not long-i>etiolulate, and in Us lengtli.uied 

 receptacle, which in the Old World species is suiall and hemispherical, even in Iruit. 



« * S'ti/les short and aeurly naked, not becoming elongated. — An kuosk proper. 

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



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

 15 inches lii"ii, 1 - 3-llowerecl : nidical leaves loMKiH-tioled, nearly semieircular m 

 outhne, teriiate, the sessile divisions deeply lobed with cleft linear segments : mvo- 

 luci-al leaves siniihir, shortly petioled : sepals 5 to 8, red or wliitish, 4 to ti lines k)ng, 

 villous externally : receptacle ohlong, the head in IVuit globular to oblong, 5 to lli 

 linos long : akoiioa very densely woolly, ovate, oblong, with a straight beak. 



Sierra Co. (LcmmoiL) ■ on tiie Columbia U)ou>jUts) ; and tVciuimtly in the mountains caslwunl. 

 ranging to the Saskaldiewaii, Lake Sui.erior, and N. New York. Also South American. 



-i- -J- Carpels fewer, pubescent only: stems \-Jiowered. 



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

 rootstcjck, 3 to 1:J inches high, without radical leaves : involucre of three petioled ter- 

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

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

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



Under reilwoods m-ar the roast Cii,jr/ow, Ilohmdcr); Sierra Co. {Lemmon) ; a.m\ m.rthward to 

 the Britisii Bouiulary. It is common on the eastern side ol' the continent, in hurope and M. 

 Asia. Pojjularly known as IVuod-^incmoue. 



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

 inches high, slend.-r : radical leaves trifoliolate ; leaflets rhomhoid, 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. Akene-s in a head. — Perennial herbs with 

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

 Flowers in corymbs or panicles. 



A genus of about 50 species, belongiug mostly to northern climates. Tiiey an; of delicate and 

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



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

 more or less 3-lolied, sonietinies toothed or cut at the apex into several lobes, the 

 base entire, anil varying in shape from cordate to cuneato : se[)als broadly ovate : 

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

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



Roeky or shaded jjlaces, Nai)a Vullcy and southward ; New Mexico and the Rocky Mountains. 

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

 6 to 9 lines long and about as wide. 



T. occinKNTALK, Gray, Pioc. Am. Acad. viii. 372, from Oregon to Montana, is very like 

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

 and leas curved than iu that. I'cihaps to be found in N. California. 



4. MYOSURUS, Linn. Molse-taii,. 

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

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

 der spike-like receptacle. S(M^d suspended. — Vei'y small annual herbs, with a tuft 

 of linear orspatulate entire radical leaves, and stilitary llowcis on simple scapes. 



