g BOTANY. 



north to the Arctic Sea and Grreenland, and west to California. Found in 

 Truckee and Kuby Valleys, Nevada, and in Parley's Park, Utah ; altitude, 

 4,300-6,000 feet; May-September. Var. hrachypus, T. & Gr., from California, 

 is a short-peduncled form of this. (14.) 



Var. STAGNATiLis, DC. (R. divaricatus, of Gray's Manual.) Frequent 

 forms occur connecting this variety with the last. It can hardly be R. 

 divaricatus, Schrank, as European and Asiatic specimens of that species show 

 a well-defined lamina to the segments of the leaves, while in American speci- 

 mens they are always filiform. The fruit of the two varieties varies in the 

 degree of hispidness and acuteness of the achenia, and affords no reliable 

 distinctions. Northern States and British America. Collected in Secret Val- 

 ley, Nevada, and near Salt Lake City, Utah ; 4,300-6,000 feet altitude ; May- 

 September. (15.) 



Ranunculus Andeesonii, Gray. Proc. Amer. Acad. 7. 327. Leaves 

 radical, palmately 2-ternate, segments laciniately cleft, petiolulate ; scape 

 1-flowered ; calyx glabrous, persistent ; achenia 4-5" long, thin and vesicular, 

 obovate, compressed, with a narrow ventral wing and slightly margined dor- 

 sally, glabrous, mucronate with a very small subulate recurved style ; seed 

 cylindrical, (1-1 i" long,) narrowly winged along the entire ventral margin, 

 attached above the base of the achenium. — Plant 3-6' high, with a coarsely 

 fibrous, almost fascicled root, either wholly glabrous or the dilated petioles 

 and lobes of the leaves sparingly ciliate with whitish deciduous hairs; 

 scape ' exceeding the somewhat fleshy leaves ; flower 1' in diameter, with 

 occasionally a lobed bract near the base; petals suborbicular, with a nar- 

 row claw and small nectariferous scale, deep-pink, the nearly equal sepals 

 margined with the same color ; wing of the seed extending beyond the 

 rhaphe both above and below. The somewhat petaloid sepals and the 

 withered petals are persistent at the base of the dense globular heads (9" 

 in diameter) of maturing fruit. In sevferal respects this is a remarkable species 

 in the genus Ranunculus. " The fruit of this species, now first collected, 

 is strikingly different from that of R. glacialis and Chamissonis, yet of the 

 same type, showing that the affinity of the species had been rightly esti- 

 mated. The akenes are several times larger, thinner, and more bladdery, 

 tipped with a proportionally very short style, the dorsal edge more or less 

 margined toward the base, but without the wing which is so conspicuous in 

 R. glacialis. The long and terete seed, very small in proportion to the cavity. 



