2 BOTANICAL GAZETTE [JANUARY 
First made known from legumes picked up from the ground 
several years ago by Mr. N. S. Plank, and later by collections 
made by Mr. B. F. Bush in 1899 and Igoo. 
Gleditsia Texana is an interesting addition to the North American 
silva. From Gleditsia triacanthos, which it resembles in foliage and in the 
staminate flowers, it is distinguished by its spineless branches and smoother 
pale bark. From all other species of the genus it differs in the legume, 
This resembles those of the many-seeded species, of which G/editsta triacanthos 
is the type, in its general form and color, and in its numerous seeds. It differs 
from them in its much smaller size, thin compressed walls with thinner mar- 
gins, and in the absence of the sweet pulp which surrounds their thicker 
lighter-colored seeds. It differs in form from the compressed pulpless 
legume of Gleditsia aquatica, and in its more numerous seeds. Like the 
legume of that species, the legume is frequently seedless. 
nown only in a single grove in a comparatively small number of individ- 
uals, and sharing something of the character of each of the other American 
species which both grow near it, the hypothesis of a natural hybrid between 
those species might be considered, were it not forthe fact that the fruit of Gledz¢- 
sta triacanthos is nearly half-grown in this region before the flowers of G/e- 
ditsta Texana open, while the flowers of G/editsta aquatica do not open until 
ten or twelve days after those of Gleditsta Texana have fallen. 

Crataegus Engelmanni, n. sp.— Leaves broadly obovate or 
rarely elliptical, rounded and often short-pointed at the apex: 
gradually narrowed below into short glandular pilose petioles, 
coarsely glandular-serrate with incurved teeth usually only above 
the middle and generally only at the apex, coriaceous, dark 
green, lustrous and roughened on the upper surface with short 
rigid pale hairs, pale on the lower surface, pilose above and 
below on the slender midribs and on the thin obscure primary 
veins and veinlets, 1 to 1% in. long and ¥% to 1 in. broad; sti- 
pules linear-lanceolate, light red, % in. long, caducous. Flowers 
34 in. in diameter, in 8 to 12-flowered wide slender-branched 
cymes thickly coated with long pale hairs ; bracts linear-lanceo- 
late, tomentose or villous, often % in. long; calyx tomentose, 
villous or nearly glabrous, the lobes narrow, acuminate, entire, 
glabrous on the outer surface and usually more or less pubes- 
cent on the inner surface, reflexed after anthesis, often deciduous 
before the ripening of the fruit; stamens ten; filaments slender ; 

Le i SNP n pushed act cee a eee 
+ SSDI aas op SE ROL ay) oe PE 
i itaicerian: 
