148 PROCEEDINGS OF THE AMERICAN ACADEMY 



uate to a stipe i inch long, 3-7-seede(l. — Collected in fruit by Mr. 

 Pringle on hillsides near Guadalajara ; October, 1889 (n. 2998). 



Sedum diffdsum. Stems short, from a widely spreading branched 

 fleshy underground rootstock, sparingly branched, glabrous, very 

 leafy : leaves alternate, sessile or clasping, narrowly oblong, obtuse, 

 2 to 4 lines long : flowers in simple terminal loose elongated spikes ; 

 bracts mostly shorter than the flowers : sepals short, ovate, obtuse ; 

 petals white, twice longer, narrowly oblong, acute: stamens 10, very 

 short : carpels becoming widely divergent above the broad base. — 

 On dry limestone ledges in the Sierra de la Silla near Monterey ; 

 May and June, 1889 (n. 2273, 2509). 



Sedum Jaliscanum. Annual, slender, loosely branching from 

 near the base, glabrous, 2 to 4 inches high, the lower branches elon- 

 gated and subdecumbent : leaves scattered, rather thin, ovate and 

 narrowed to a long petiole (in all 9 to 12 lines long), becoming more 

 or less nari'owly oblanceolate and gradually reduced and narrowed 

 above : flowers solitary in all the axils, very shortly pedicellate : 

 sepals narrowly linear, nearly equalling the linear-lanceolate acumi- 

 nate white petals (1|- lines long), exceeding the carpels: stamens 10, 

 the very slender filaments about equalling the petals : carpels erect 

 or slightly spreading. — On shaded mossy rocks near Guadalajara ; 

 September and October, 1889 (n. 2192, 2451). Very peculiar 

 among American species in its habit. 



Sedum Alamosanum. Perennial, the rootstock densely branched 

 and sending up numerous crowded stems at first clavate with the densely 

 imbricated foliage, at length more elongated (3 or 4 inches long) and 

 the leaves more scattered : leaves puberulent, terete, linear-oblong, 1^ 

 to 2 lines long: inflorescence unknown. — Under shelving rocks in the 

 Alamos Mountains, Sonora; Dr. Edward Palmer, 1890. A very pecu- 

 liar species, much like S. Greggii in habit, but ditFering in its foliage. 



Cotyledon Pringlei. Stems stout, decumbent, a foot long or 

 more, very leafy and branching : leaves (and branches) puberulent, 

 rather thin, broadly oblanceolate, acute, mostly 1 or 2 inches long : 

 racemes simple, terminal, the foliaceous bracts nearly equalling the 

 flowers ; pedicels 2 to 4 lines long : sepals narrowly lanceolate, 

 acuminate, as long as the corolla (6 to 8 lines) ; petals united only 

 near the base, red, very acutely and prominently carinate, acuminate : 

 stamens a third shorter. — On dry shaded ledges of the barranca near 

 Guadalajara; 1889 (n. 1853). 



Myriopiiyllum Mexicanum. Stems stout : floral leaves narrow, 

 pectinately pinnatifid or toothed, in whorls of 4 to 6, or in alternate 



