+ 



New Plants from Wyoming.— IX 



By Avex Nelson 



-^ Ranunculus alpeophilus 



Similar to Rannnculus Eschscholtzii in luibit, usually larger, 

 bright green/nearly glabrous throughout: leaves sparsely and ob- 

 scurely ciliolate on the margins ; the radical orbicular-flabelliform 

 to nearly reniform, some of them coarsely crenately toothed, others 

 incisely lobed, the middle lobe lingulate, the lateral ones unequally 

 toothed, more rarely divided nearly to the base ; stem leaves few, 

 near the summit and somewhat involucrate, divided nearly to the 

 base into oblong lobes, the lateral lobes sometimes again lobed or 

 toothed : flowers mostly 3, surpassed by the leaves, the pedicels 

 elongating in fruit : calyx glabrous or nearly so : akenes broadly 

 oval or obovate. 



To be distinguished from R, Eschscholtzii by being nearly 

 glabrous even as to the calyx, by the broader and less divided 

 radical leaves, by the long lobes (3-5 cm.) of the upper leaves and 

 by the broader summit of the akenes. 



It is probable that much, if not all, of the material from the 

 middle Rockies, that has been distributed as R. Eschscholtzii y be- 

 longs to this species. Several collections of it have been secured, 

 from nearly alpine stations in this State, growing \\\ moist, rich 

 soil. Nos. 1780 and 421 1 by the writer, and no. 5252 by Mr- 

 Elias Nelson may be cited as typical, 



^Arenaria pinetorum 



Root and caudex woody, the latter freely branched, its slender 

 branches clothed with the dead leaves and partly buried in the 

 loose soil : stems singly from the crowns, minutely glandular-pubei- 

 ulent, 6-15 cm. high, of several internodes : leaves smooth or 

 nearly so, linear, 2-5 cm. long, somewhat crowded on the crowns, 

 rigid and needle -pointed ; those of the stems exceeding the inter-^ 

 nodes (often twice as long), the uppermost becoming scarious and 

 passing into the scarious, lanceolate bracts : cyme short and dense, 

 the bracts conspicuous ; sepals rigid, linear-lanceolate, scarious 

 margined, pungent, about 7 mm. long ; petals narrowly oblong, 

 distinctly exceeding the sepals (about 10 mm. long). 



This species is to be compared with A. Hookcri Nutt. fi'^^'' 



(350) 



