12 RANUNCULACE. THALICTRUM. 
. MYOSURUS. 
petioled, 3-4-ternate; leaflets approximate, petiolulate, moderately firm, 
rounded and lobed at the apex, rugose-veiny beneath: panicle simple, nar- 
row, its short erect branches few-flowered: flowers dicecious, small; sepals 
ovate: stamens 10-20, on slender filaments; anthers oblong, slender-point- 
ed: achenes. about 8, nearly sessile, 2 lines long, ovoid, tapering into a 
straight beak, thick-walled, 2-edged. with 4 or 5 longitudinal grooves and 
rounded ridges on each side: seed ovoid, pointed at one end, filling the 
achene. Klickitat Co, Washington to Brit, Columbia and Wyoming. | — 
T. occidentale Gray Proc. Am. Acad. viii, 872. Stem slender, 1-3 feet 
high; leaves 2-4-ternate, the lowermost petioled; leaflets thin, 2-10 lines 
long, 3-9-lobed at the summit, sparingly glandular-puberulent beneath: 
flowers dicecious, rarely polygamous, nodding, on very slender pedicels, in 
an ample open panicle: filaments purplish, slender; anthers linear, cuspi- 
date: achenes 1-10 in each head, lanceolate or somewhat falcate, 4-7 lines 
long, tapering below into a short stipe, and’above into a long one-sided 
curved beak, acutely 8-10 ribbed. Along streams, and moist shady places, — 
Brit. Columbia to California, west of the Cascade Mountains. ( 
4 MYOSURUS Dillenius Giess. 106, t. 4. L. Gen. n. 394. 
Little annuals with linear or linear-spatulate entire leaves, and 
solitary flowers on simple scapes. Sepals 5 or 6, spurred at base. 
Petals as many as sepals, on long claws, with a pit at the summit. 
Stamens 6-20. Achenes witha proininent costa terminating in an 
erect or more or less spreading beak, numerous on a slender or 
conical receptacle. Ovule suspended. 
M. minimus L. Sp. i, 284. Leaves linear: scapes 1-4 inches high. about 
equaling the leaves; receptacle in fruit an inch or more high: achenes 
quadrate with a broad back, truncate at the apex; beak short, appressed: 
seed oval. In wet places, Willamette valley to California and the Atlantic 
States and Europe. ; 
M. apetalus Gay Hist. Chil. Bot. i, 31, t. 1, fig. 1. Scapes 1-2 inches 
high, usually spreading, but little surpassing the linear leaves; petals often’. 
wanting: spike of achenes 3-10 lines long, ovoid-oblong and more or less 
squarose, or cylindrical: achenes oblong, thin-walled, with narrow, prom- 
inently carinate back prolonged into a spreading or ascending beak: seed 
oblong. In alkaline places, California to Brit, Columbia east of the Cascade’ 
Mountains: also Chili. . “ ae 
M. lepturus. M. apetalus var. lepturus, Gray, Bull. Torr. Club, wiii, 2. 
Scapes in fruit 3-6 inches high, erect, surpassing the linear-spatulate leaves : 
receptacle in fruit 8-24 lines high: achenes with broad, distinctly carinate 
back, and short, appressed beak: seed elongated-oblong, Common in wet 
places, from California to Brit. Columbia and the Rocky Mountains. 
M. sessilis Watson Proc. Am. Acad. xvii, 362. capes very short or 
none: fruiting heads several, crowded, much shorter than the leaves: rec- 
eptacle short and thick, often sessile, 1-6 lines long by 1-2 lines thick at 
base ; achenes oval, scarious-utricular, with narrow salient keel, and subu- 
late, erect beak: seed short-oval. A rare species, the only locality known, 
heing an alkaline flat seven miles south of Arlington Oregon. 
Tribe 3. Ranunculee, DC. Sepals imbricated in the bud. Pistils 
numerous, rarely few, 1-ovuled, becoming achenes. Ovule ascending. 
Herbs with alternate cauline leaves 
5 TRAUTVETTERIA Fischer & Meyer Ind. Sem. 1835, 22. 
Herbs with palmately lobed alternate leaves, and small flowers 
in terminal corymbose panicles. Sepals usually 4, concave, petal- 
