Tas. 8748. 
ECHEVERIA seE Tosa. 
Mexico. 
CRASSULACEAE, 
Ecueveria, DC.; Rose in N. Amer, Fl. vol. xxii. p. 13; Benth. et Hook. Ff. Gen. 
Plant. vol. i. p. 659, sub Cotyledon, Linn. 
Echeveria setosa, Rose ef Purpus in Contrib. U.S. Nat. Herb. vol. xiii. p. 45; 
Rose in Addisonia, i. 11, cum icon.; a speciebus ceteris foliis et inflore- 
scentiis albo-setosis differt. 
Herba succulenta, acaulescens. Folia usque ad 100 vel ultra, in rosulam 
densam 7-10 cm. diametro, 4-7 cm. altam collecta, sessilia, supra fere 
plana, subtus convexa, oblanceolato-spathulata, ad 5 cm. longa, 1°8 em. 
lata, 5 mm. crassa, mucronato-cuspidata, viridia, nitida, pilis patentibus 
utrinque albo-setosa. Scapt e foliorum superiorum axillis orti, 1-4 ex 
quaque rosula, 10-12 cm. longi, laxe foliati, foliis anguste oblongis. 
Inflorescentiae scorpioideae, simplices vel bifurcatae; bracteae inferiores 
1-1-5 cm. longae, apice basique angustatae, utrinque convexae, superiores 
gradatim minores; pedicelli inferiores-1-3 em. longi. Sepala patula, 
lineari-oblonga, viridia, ad 10 mm. longa, 2-3 mm. lata. Corolla 
10-16 mm. longa, basi rubra, apice flava, intus levis, extra leviter setosa 
fere ad basin in segmenia lineari-oblonga fissa. Stamina 10, inclusa, alba. 
Carpella 4-5 mm. longa, in stylum gradatim attenuata; stylus 4-5 mm. 
longus, viridis.—M. L. Green. 
The genus Lcheveria was proposed by Decandolle in 
1828 for those species from America which earlier 
authors had referred to Cotyledon, originally founded by 
Linnaeus on African and Mediterranean plants. The 
new genus differed from Cotyledon mainly in having the 
petals connate only at the base and the stamens shorter 
than the petals. In 1865 Bentham and Hooker declined 
to accept these differential characters as adequate. In 
their view the only character by which Echeverta could 
be distinguished from Cotyledon is to be found in the — 
pentagonal corolla. But floristic convenience at times 
finds monographic canons unduly severe, and its dictates 
have induced Dr. Rose to reconsider the verdict of the 
Genera Plantarum. In 1903 this careful student reverted 
to the view of Decandolle, and two years later definitely 
Jan.~Marcu, 1918, 
