20 NORTH AMERICAN FLORA [V01.UME 22 



flowers about 20, subsessile, the lower pedicels not elongating ; sepals very unequal, the 

 lower ones about half the length of the corolla ; flower-buds fluted ; corolla 10 mm. long, 

 salmon-red, the lobes erect, acute, connivent in age ; stamens and erect style about two- 

 thirds the length of the corolla ; stigmas green. 



Collected by Dr. Wm. Trelease near Tehuacan, Puebla, Mexico ; flowered in June, 1904 (Mo. 

 Bot. Gard. accession no. 130/04/30). 



This species, seems to be nearest E. Peacockii, having glaucous leaves, a very similar inflor- 

 escence and flowers. It differs chiefly in that the leaves are shorter and somewhat different in 

 shape, the flowers not strictly sessile and the floral bracts are broader. The rosettes of leaves sug- 

 gest E. cuspidata but the inflorescence is quite different. E. glauca and E. secunda have very 

 different leaves and pedicels. 



26, Echeveria bifida Schlecht. I^innaea 13: 411. 1839. 



Cotyledon bifida Hemsl. Biol. Centr, Am. Bot. 1 : 388. 1880. 



Leaves in rosettes, rhomboid to lanceolate ; inflorescence two-branched, each branch a 

 secund raceme ; pedicels 8 mm. long ; corolla 12 mm. long. Said to resemble E. secunda. 



Type locality : *' Iii Barranca post Regla versus San Bartolo." 

 Distribution : Known only from the type locality. 



27. Echeveria humilis Rose, Bull. N. Y. Bot. Gard. 3 : 8. 1903. 



Acaulescent, or with a short woody caudex, glabrous throughout. Basal leaves in a 

 dense rosette, thickish, lanceolate, acute, 5-6 cm. long ; flowering stems about 1 dm. long, 

 rather weak, leafy below ; inflorescence a few-flowered secund raceme, sometimes panicu- 

 lately branched; pedicels 2-3 mm. long, bractless ; sepals lanceolate, very unequal, the 

 longer 4-5 mm, long, acute ; corolla 8-9 mm. long, its segments united for about one- 

 fourth their length. 



Type locality : San lyuis Potosi, Mexico. 

 Distribution : San I^uis Potosi. 



28. Echeveria Byrnesi Rose, sp. nov. 



Acaulescent, forming dense rosettes of leaves. Leaves bright-green or tinged with red, 

 not at all glaucous, obovate to oblanceolate, 4-5 cm. long, about 2 cm. broad at widest part, 

 mucronate ; inflorescence a secund raceme ; leaves of flowering stem narrow ; sepals nar- 

 rowly ovate, acute ; corolla about 1 cm. long, the lobes acute, winged on the back (at least 

 in herbarium specimens). 



Collected by J. N. Rose and Jos. H. Painter on the Volcano of Toluca, Mexico, October 15, 

 1903 {no. 7991). I^iving specimens {no. 918) were also sent home which show clearly that the 

 species, while of the E. secunda and E. glauca type, is very distinct from them. This species, on 

 account of its dense rosettes of green leaves, ought to become a useful bedding plant : it is named 

 for Mr. E. M. Byrnes^ for many years an expert grower of Echeverias, now Superintendent of 

 Gardens and Grounds m the U. S. Department of Agriculture. 



29. Echeveria pinetorum Rose, sp. nov. 



Acaulescent, forming very dense rosettes of leaves. Leaves bright-green, the margins 

 tinged with red, narrowly oblanceolate, 2-4 cm. long, 1-1.5 cm. broad, rounded beneath, 

 acute and mucronate-tipped ; flowering stem, including the inflorescence, 1-2.5 dm. long, 

 bearing closely set leaves 2-3 cm. long, below, and small ovate ones above ; inflorescence 

 an open-flowered equilateral raceme or spike ; flowers subsessile ; sepals ovate, acute, some- 

 what unequal ; corolla 8-10 mm. long, its lobes acute. 



Collected by E- A. Goldman in pine woods 20 miles southeast of Teopisca, Chiapas, Mexico, 

 May 8, 1904 {no. 1013)\ flowered in Washington, March, 1905. 



The imperfection of the original material of this species led to its association with E. Byrnesii. 

 The recent flowering of some of the plants, which has shown that its true relationship is rather 

 with E. sessiliflora, occurred in.time to correct the description, but too late to alter the arrange- 

 ment of the species. 



30. Echeveria heterosepala Rose, Bull. N. Y. Bot. Gard. 3 : 8. 1903. 



Acaulescent. Basal leaves forming a dense rosette, obovate, somewhat acuminate, 

 tipped with a long mucro, glabrous, perhaps also glaucous, 3 cm. long (in specimens seen) ; 

 leaves of lower part of flowering branches large, above somewhat reduced ; inflorescence a 

 secund raceme, 12-15-flowered, at first nodding; lower pedicels longer, 6-7 mm. long; 



