FIVE NEW SPECIES OF CRASSULACEAE FROM MEXICO, 
By J. N. Rose. 
No other group of flowering plants make in general such unsatis- 
factory herbarium specimens as do the Crassulaceae when treated in the 
usual way. In some species the stem leaves drop off easily, and in 
nearly all they will gradually detach themselves unless specially 
treated. Some species will grow in the herbarium for months, taking 
on abnormal shapes and gradually becoming dismembered. In nearly 
every case it is best to prepare herbarium specimens by plunging the 
entire plant or its parts into boiling water, in some cases allowing 
the material to remain seyeral minutes. In this way the tissues 
are killed and the plant dries readily. By this treatment, how- 
ever, the shape of the leaves is destroyed, and in the case of the thick 
terete leaves some very important characters are lost. Indeed, it 
seems almost impossible to identify some of the older species even with 
the type‘in hand. Owing to the great number of species recently 
described from Mexico, and the indications that many more are to be 
described, it seems highly desirable that the habit and foliage especially 
should be shown either by photographs or by drawings. In my own 
work I shall try in the future to photograph all new species which are 
described from living material. 
The present paper contains descriptions of some miscellaneous new 
species, all of which are accompanied by full-page illustrations. 
Echeveria bifurcata Rose, sp, noy. Piate LXXVIT. 
Caulescent, usually forming a simple rosette of leaves; basal leaves lanceolate, 
acuminate, rather bright green, apparently never coloring very much, 5 to 7 em. 
long, 10 to 15 mm. broad, deeply concave on the face; flowering stem 20 cm. long, 
leafy to the base, the leaves green and not at all glaucous, semiterete, acute, 3 to 5 
em. long; inflorescence 2-branched, each branch a secund raceme 8 to 12 em. long; 
pedicels almost wanting; sepals spreading at right angles to the corolla, very unequal, 
acute; corolla 10 to 12 mm. long, bright red above, paler below. 
Collected by J. N. Rose near Ixmiquilpan, Hidalgo, July, 1905, and flowered in 
Washington in July, 1906. 
Type U. 8. National Herbarium no. 454971. 
EXPLANATION OF PLATE LX XVII.—From a photograph of a greenhouse plant. Scale }. 
Echeveria trianthina Rose, sp. nov. Prare LXXVITT,. 
Acaulescent, giving off rosettes freely; basal leaves numerous, deep purple and 
mucronate when young, becoming greenish and losing the mucro, oblanceolate, 6 
to 12 em. long, 10 to 18 mm. broad, very thick, rounded below, concave above; 
85408—voL 12, pr 10—09—3 439 
