392 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Thompsonella minutiflora (Rose) Britton & Rose. PLATE XLIV. 
Echeveria minutifiora Rose, Bull. N. Y, Bot. Gard. 3: 9. 1903. 
Flowering stems glaucous, clothed with thick but reduced leaves ; basal leaves 
acute or obtuse, often strikingly purplish, glaucous; inflorescence either a simple 
equilateral spike or a very narrow panicle; sepals acute, distinct, narrow, 
thickened and nearly terete above; corolla segments a little longer than the 
sepals, red tinged with green, troughed above. 
Distribution Puebla and Oaxaca. 
Redescribed from specimens flowering in the greenhouses of Washington and 
New York, October, 1905. 
EXxpLANATION OF PLate XLIV.—Fig. a, plant ; b, cross section of basal leaf; ¢, cross sec- 
tion of stem leaf; d, cross section of sepal; e, flower; f, carpels; yg, petals and stamens. 
Figs. a to d, natural size; e to g, seale 5. 
Thompsonella platyphylla Rose, sp. nov. PLATE XLV. 
Basal leaves oblanceolate, 8 to 12 em. long, 8 to 4 cm. broad, narrowed at 
base into a broad, thick petiole, acute when young, glaucous and with purple 
margins, in age obtusish and green; flowering stem 20 em. long, glaucous, 
naked below, bearing 3 small leaves below the inflorescence ; inflorescence a nar- 
row panicle; sepals glaucous, thick, almost terete, distinctly united at base; 
petals longer than the sepals, 6 mm. long, acute. 
Collected by C. G. Pringle in Iguala Canon, Guerrero, Mexico, in July, 1907, 
and described from specimens which flowered in Washington early in 1908, 
Type U. 8S. National Herbarium no, 574982. 
EXPLANATION OF PLATE XLV.—A potted plant. Scale about 3. 
