Hoxienia, ¥21 
PURSHIA. 
(Family Rosaceae). 
Spreading rather rigidly 
branched shrubs. Twigs some- 
what fluted, becoming terete, 
slender, with quickly flaking cor- 
tex: pith minute, angular, con- 
tinuous, light brown. Buds soli- 
tary, sessile, ovoid, with several 
more or less ciliate scales, rather 
quickly developing into short 
branches covered by the _ over- 
| o lapping leaf-bases. Leaf-scars al- 
ternate, half-round, with 1 bundle- 
trace, minute, much raised on 
thin winged bases topped by the 
stipules, or these finally falling 
and their linear scars encircling 
the stem. (Tigarea; Kunzia). 
Purshia is hardly to be counted 
a decorative plant. 
Twigs at first somewhat hairy 
and bristly. P. tridentata. 
Winter-character references to Crataegus:—C. azarolus. 
Bésemann, 50; Schneider, f.172. ©. coccinea. Hitchcock (1), 
4, (3), 15, (4), 137, £. 71-73. C. crus-galli. Bosemann, 50; 
Schneider, f. 173. C. monogyna. Bosemann, 50; Fant, 20; 
Schneider, f. 110, 172. ©. mollis. Hitchcock (1), 4, (3), 15. 
C. nigra. Schneider, f. 174. C. Oxyacantha. Bosemann, 50; 
Fant, 26, f. 23; Schneider, f. 174; Ward, 1:194, f. 97-98; Will- 
komm, 8, 10, 31, f. 41. C. punctata. Otis, 150. C. sanguinea. 
Schneider, f. 172. CC. tanacetifolia. Schneider, f. 173. C. to- 
mentosa. Brendel, pl. 3; Hitchcock (1), 4. 
o\e 2 8 
