Rydberg : Rockv Mountain flora 405 



sepals rounded ovate, rounded at the apex, about 5 mm. long, half 

 as long as the pink obovate petals ; inflorescence 5— 10-flowered, 

 short, little exceeding the leaves, bractlets lanceolate ; capsule 

 shorter than the sepals ; seeds about 2 mm. long, black and very 

 glossy. 



The few specimens of this species that are found in our her- 

 baria bear a variety of names, as C. caroliniana, C. caroliniana 

 lanceolata, C. caroliniana sessUifolia and C. lanceolata sessilifolia. 

 The original C. lanceolata Pursh is a much larger plant with broad, 

 strongly 3-ribbed stem-leaves, elongated inflorescence and large 

 flowers, the sepals being about 6 mm. long. The type of C. 

 caroliniana sessilifolia Torr., is a plant somewhat resembling the 

 present species, but with somewhat broader leaves abruptly con- 

 tracted at the sessile base and with acutish sepals. Neither in 

 the herbarium of the New York Botanical Garden nor in that of 

 Columbia University is found any other specimen matching the 

 original collected by Bigelow. Most species of Claytonia are 

 found near water or in damp places. The type of C. rosea was 

 collected on rather dry hills, at an altitude of 2200-2300 m. 



Colorado : La Veta, 1900, Rydberg & Vreeland, 6joo (type) ; 

 " Colorado," G. C. Woolson ; 1875, W. A. Henry; Graham's 

 Peak, 1899, C. F. Baker, joj. 



Wyoming: Pole Creek, 1894, Aven Nelson, 2j. 



Cerastium pulchellum sp. nov. 



Low decumbent perennial with horizontal cespitose rootstock : 

 stems 5-10 cm. long, finely viscid pubescent; leaves oblong to 

 oval, obtuse or raiely acutish, about 1 cm. long and 4 mm. wide, 

 subsessile and slightly connate at the base, viscid pubescent on 

 both sides ; peduncles 1 — 1.5 cm. long ; inner sepals oblong ; outer 

 oval, scarious-margined both on the side and at the rounded apex, 

 about 4 mm. long; petals obcordate, 10—12 mm. long. 



This species is nearest related to C. Earlci and C. bchringianum. 

 From the former it differs in the low habit, the very obtuse scar- 

 ious-tipped sepals and the short blunt leaves ; from the latter in 

 the large petals and the scarious-tipped sepals. It grows in the 

 mountains at an altitude of about 3900 m. 



Colorado : Hayden Peak, 1898, Baker, Earlc & Tracy, 57J. 



