OF ARTS AND SCIENCES. 297 
very narrowly linear with a contracted base, acute, 6 to 10 lines long, 
much shorter on the branches: fertile flowers very small, often solitary, 
the deeply cleft calyx unappendaged: seed very small (4 of a line 
broad), horizontal, not at all tuberculate under the microscope. — 
Utah and Arizona; Dr. C. C. Parry (n. 218, S. Utah, 1874, and 
n. 84, Central Utah, 1875); L. F. Ward, on Powell’s Survey (n. 152 
and 718, 1875); also Hooker & Gray, 1878. Somewhat resembling 
S. suffrutescens, which is more shrubby and pubescent, with lax and 
flexuous stems, stouter and obtuser leaves, calyx less deeply lobed, 
and the usually vertical seed obscurely tuberculate. 
CELTIS BREVIPES. A small tree (becoming 20 feet high and 18 
inches in diameter), sparingly pubescent: leaves small (1 to 1} 
inches long), entire, oblong-ovate, acuminate, rounded or cuneate at 
base, rather thin, finely but conspicuously reticulated, roughish 
above: fruit nearly 3 lines long, on slender pedicels about equalling 
the very slender petioles (2 lines long). — Near Camp Grant, Ari- 
zona; Dr. J.T. Rothrock (n. 367), on Lieut. Wheeler’s Survey, 1874. 
Croton (DREPADENIUM) TENUIS. Perennial, woody at base, with 
slender decumbent stems a foot or two high: leaves narrowly oblong, 
a half to one inch long, with short petioles (1 to 4 lines): staminate 
flowers small and in small racemes: capsule 2 lines long: caruncle of 
the seed prominent, with a broad appressed lobed base. — S. Cali- 
fornia; Potrero, S. Diego County, D. Cleveland; Soda Lake, near 
Fort Mohave, Cooper. — C. Catirornicus, Muell., differs in its less 
slender habit and broader leaves with longer petioles, and especially 
in its larger flowers and much larger capsules and seeds, the latter 
with a small appressed caruncle. It differs also both in habit and 
fruit from the allied C. Neo-Mexicanus of S. Utah and New Mexico, 
and the Mexican C. gracilis. 
STILLINGIA LINEARIFOLIA. Perennial, branching from a woody 
base, the herbaceous slender terete ascending stems a foot high or 
more: leaves linear, entire or rarely slightly glandular-toothed, acute, 
sessile, 6 to 12 lines long: spikes terminal, very slender and open, 
1 to 14 inches long, with very small ovate acute 1-flowered bracts, 
minutely glandular on each side: staminate flowers with turbinate 
calyx, diandrous: pistillate flowers 2 to 7, scattered, without calyx: 
capsule 1} lines long; horns of the gynophore rather thin, and cen- 
tral column often persistent: seed broadly ovate, acute, a line long, 
smooth, without caruncle.—S. California; near Boundary Monu- 
ment, San Diego, Dr. E. Palmer (n. 449, 1875); San Bernardino, 
Parry & Lemmon (n. 376, 1876). Referable, with the following 
