296 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Echeveria pittieri Rose, sp. nov. 



Caulescent, 10 cm. or more high, crowned at the apex by a loose rosette of leaves, 

 glabrous throughout; leaves 6 to 8 cm. long, oblanceolate, tapering into a distinct 

 petiole, acute, greenish or somewhat purplish, sometimes a little glaucous; flowering 

 stem about 20 cm. long, leafy; leaves similar to stem leaves; inflorescence a dense 

 epike 4 to 5 cm. long; flowers subtended by small linear rose-colored bracts and two 

 inner bractlets; calyx cleft nearly to the base into linear, acute lobes about two- 

 thirds the length of the corolla, rose-colored; corolla when in bud somewhat 5-angled; 

 corolla about 12 mm. long, deeply cleft, the lobes stiff, erect or slightly spreading, 

 acute, rose-colored, with a pronounced pocket near the base within; 5 stamens oppo- 

 site the 5 petals inserted just above this pocket, the other 5 attached to the corolla 

 but lower down; ovaries erect, tipped by the long, slender styles. 



Type U. S. National Herbarium no. 618381, collected around the lagoon on the 

 volcano of Ipala, Guatemala, altitude, 1,500 meters, by Henry Pittier (no. 1880). 



The living material sent by Mr. Pittier flowered in Washington in January, 1911. 



GRAPTOPETALUM, A NEW GENUS. 



Graptopetalum Rose, gen. nov. 



Acaulescent or in time becoming shortly caulescent; leaves forming a rather com- 

 pact rosette, thickish, acute; inflorescence a few-flowered, open cyme; sepals 5, erect, 



green, nearly distinct; corolla 

 short-tubular, its lobes widely 

 spreading horizontally or even 

 reflexed, more or less banded 

 with red; stamens 10, in age 

 recurved back of the petals; 

 carpels 5, erect even when 

 mature, abruptly contracted 

 into a short style; scales small. 

 The rosettes of this plant 

 suggest a small Echeveria, 

 while the flowers and inflo- 

 rescence point to Sedum. The 

 rotate corolla is very unlike a 

 true Echeveria, while the 

 united petals would keep it 

 out of Sedum. The flower is 

 somewhat like that of Altami- 

 ranoa, but its habit, foliage, 

 etc., do not agree well with 

 that genus. 



Fig. 55.— Graptopetalum pusillum. a, Flower; b, petals and 

 stamens; c, scale at base of carpel; d, carpels. Natural size. 



Plate 52. Figure 55. 



The name alludes to the markings of the petals. 



Graptopetalum pusillum. Rose, sp, nov. 



Rosettes 3 to 4 cm. in diameter; leaves spatulate, 2 to 4 cm. long, acute, glabrous, 

 pale, and slightly glaucous; stems about 10 cm. long, weak but erect or often falling 

 over; f;tem leaves alternate, linear; inflorescence somewhat cymose; pedicels 4 to 8 

 mm. long; sepals linear, acute, distinct nearly or quite to the base, 2 to 3 mm. long, 

 slightly glaucous; corolla tube 2 to 3 mm. long; lobes 6 to 7 mm. long, spreading or 

 recurved, acute, yellowish to cream-colored, slightly blotched or banded with red; 

 stamens slender, in age recurved upon the tube of the corolla; carpels erect at least 

 when young. 



Type U. S. National Herbarium no. 615399, derived from material collected by 

 Dr. E. Palmer in the State of Durango, Mexico, in 1906, and flowered in Washington 

 in 1906 and 1907. 



