298 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Type U. S. National Herbarium no. 571201, collected by Dr. E. Palmer at San 

 Ramon mining camp, 80 miles west of Durango City, April 214o May 18, 1906 (no. 181). 



This species grows on cliffs among moss. It resembles somewhat S. spathulatum 

 but the flowers are pure white, not yellow. I have placed it next to S. lumholtzii, 

 although that species is pubescent. I have had the plant in cultivation since 1906. 



Sedum flaccidum Rose, sp. nov. 



Roots thickened and probably perennial; stems annual, weak, much branched, 

 8 to 10 cm, long, glabrous, green or purplish; leaves alternate, turgid, ovate to linear- 

 ovate in outline, 5 to 10 mm. long; flowers 2 to 5, rather scattered, forming an open 

 eecund raceme; pedicles often slender, 5 to 10 mm. long; sepals nearly distinct, green 

 and leaf-like, nearly equal, 2 to 3 mm. long; corolla widely spreading; petals with a 

 broad flat blade, spoon-shaped above and pointed at the apex, white but more or 

 less banded, especially below, with red; stamens 10, five borne on the base of the 

 petals, the other five distinct, curved outward; scales small, black; carpels at first 

 erect but in age spreading; styles short. 



Type U. S. National Herbarium no. 571538, collected by Dr. E. Palmer at Tejamon, 

 Durango, Mexico, in August, 1906 (no. 513). 



Undoubtedly a near relative of S. napiferum and S. calcaratum. 



Sedum frutescens Rose, sp. nov. 



Leaves linear, flattened, 2 to 6 cm. long, bright green, acute, closely set upon the 

 branches, rounded and free at base; inflorescence a small, few-branched cyme; 

 peduncle 1 cm. or less long; branches 3 to 4 cm. long; petals white, 5 to 6 mm. long, 

 acuminate; carpels widely spreading. 



Type U. S. National Herbarium no. 462340, collected by C. G. Pringle in flower in 

 1904 (no. 13266). The description is chiefly drawn from Mr. Pringle's material. 



Living material of this species was collected by J. N. Rose on the rocky bluffs near 

 El Parque, Morelos, in 1903 (no. 845) and sent to Washington. This material is 

 still in cultivation, but has not yet flowered. 



Very much resembling S. oxypetalum in size and habit, but with very different 

 foliage and flowers. 



Sedum humifusum Rose, sp. nov. Plate 55. 



Plants creeping, forming a dense moss-like carpet, sending off hundreds of entail 

 branches 1 cm, or less long bearing a compact rosette of leaves; leaves clos ily 

 imbricated, nearly orbicular, about 4 mm. in diameter, flattened but fleshy, cilia je; 

 flowers solitary, terminal, the peduncle proper 1 cm. or less long, bearing a few lea\ ^s; 

 sepals distinct or nearly so, leaf-like, very thick, ciliate, 2 mm. long; corolla abcut 

 10 mm. broad; petals yellow, distinct, widely spreading; stamens 10, erect; scaies 

 minute, orange-colored; carpels, in flower at least, erect. 



Type U. S. National Herbarium no. 399703, derived from material collected by 

 C. G. Pringle near San Juan del Rio, Queretaro, Mexico, in 1905, which flowered n 

 Washington, April, 1906. 



Sedum lenophylloides Rose, sp. nov. 



Perennial, woody at base, 5 to 30 cm. high, somewhat branched, the branches 

 strict; leaves at right angles to the stem, closely set, usually alternate, but the lower 

 ones either opposite or subopposite, 10 to 15 mm. long, very turgid, rarely subterete, 

 rounded below, somewhat trough-shaped above, acutish, often purplish; inflorescence 

 a short terminal panicle; sepals green, ovate; petals greenish white, lanceolate; sta- 

 mens 10, the five opposite the petals borne on these, the other five distinct; scalee 

 large, orange-colored; styles elongated, slender; carpels erect at first, afterwards more 

 or less spreading. 



Type U. S. National Herbarium no. 574882, collected in the mountains of Monterey, 

 Mexico, by C. G. Pringle in September, 1907. Mr. Pringle had collected the same 

 in 1903, and this collection has been growing in Washington since that time, but did 

 not flower until September, 1907. 



