296 PROCEEDINGS OF THE AMERICAN ACADEMY 
white-tomentose radical leaves (an inch or two in diameter): involucres 
in the forks and secund on the short branches, large for the section 
(a line long or more), turbinate and somewhat angled, erect or nearly 
so on pedicels 1 to 3 lines long: flowers glabrous, rose-colored, be- 
coming nearly a line long, the sepals oblong-ovate, subcordate at base : 
akene attenuate, 3 of a line long. — Near Red Creek, 8. Utah; Dr. 
E. Palmer (a. 451, 1877). 
Er1oGonum (OrEGONIUM § CoRyMBOSA) suLCATUM. A woody 
very diffusely and intricately branched floccose-tomentose perennial, 
nearly glabrous above, the branches very strongly angled and sulcate: 
leaves narrowly oblanceolate, thin and lax, an inch long or less, silky- 
tomentose, less so above: bracts very small: involucres minute (4 to 
3 of a line long), sessile, glabrous. — Near St. George, S. Utah; Dr. 
E. Palmer (n. 432, 1877). Allied to #. microthecum; very distinctly 
marked by its angular branches. 
HOLLISTERIA ; new genus of Hriogonee. Involucre unilateral, 
of 3 equal slightly united linear herbaceous (not cuspidate) bracts, soli- 
tary and sessile in the axils, 2-flowered. Perianth turbinate, mem- 
branous, 6-cleft to the middle, the slender segments not rigid nor 
awned. Stamens 9, on the throat, included. Akene glabrous, tri- 
angular above. Embryo curved, the slender radicle accumbent to 
the orbicular cotyledons. — A small fragile leafy annual, diffusely 
branched from the base, white-woolly throughout; leaves apparently 
all alternate and foliaceous, but these each with a very small stipule- 
like pair at base, all cuspidate; flowers on short unequal pedicels, 
with a minute scarious bractlet at base. — A single species; the genus 
dedicated to Col. W. H. Hollister, of Santa Barbara, upon whose 
ranch it was found, and through whose aid and encouragement Mr. 
J. G. Lemmon made the collection in which it was detected. 
HOLLISTERIA LANATA. Decumbent or prostrate, covered with a 
loose white woolly tomentum, which is less dense on the lower leaves: 
leaves oblanceolate, attenuate at base, the lower 1 to 3 inches long, the 
upper much shorter and narrowly ovate, aculeate-tipped ; the stipule-like 
pair linear-subulate (1 to 3 lines long): perianth very woolly exter- 
nally, a line long, the linear-lanceolate segments green with a scarious 
margin, the inner slightly shorter and broader: filaments filiform: 
styles slender: akene black, ovate with a stout triangular beak. — 
Near San Luis Obispo. 
SUDA INTERMEDIA. Perennial, the straight erect slender her- 
baceous stems from a short woody base, 9 to 18 inches high, glabrous 
or sometimes puberulent; branchlets also slender, ascending: leaves 
