262 BOTANICAL GAZETTE [APRIL 
Tonestus, n. gen.—Low herbaceous perennials from woody 
roots, having a short more or less branched subligneous caudex. 
Stems simple, a few to several centimeters high, leafy throughout, 
monocephalous. Leaves herbaceous, obscurely 3-nerved, spatu- 
lately tapering to a short margined petiole. Heads relatively 
large (15-25™™" broad); the involucral bracts herbaceous, in 
about two loosely imbricated rows, usually with one to several 
outer foliaceous ones. Rays conspicuous, ten or more; the disk 
flowers more numerous. Pappus soft and white, equaling the 
corolla. Style tips slender, subulate-elongated. Akenes glab- 
rous or pubescent. Anagram of Stenotus. 
v1. Tonestus Lyallii, n. n—Aplopappus Lyallii Gray, Proc. Acad. 
Philad. 1863: 64; Syn. Fl. 1: 131; Pyrrocoma Lyallii Rydb. Mem. 
N. Y. Bot. Gard. 1: 382. 1900. 
~ 2. Tonestus laceratus, n. n.—Aflopappus laceratus Henderson, 
Bull. Torr. Bot. Club 27: 347. 1900; Stenotus laceratus Heller, 
Muhlenbergia 1: 7. 1900. 
“ 3. Tonestus pygmaeus, n. n.— Stenotus pygmaeus T.& G. FL 
2: 237. 1842; Aplopappus pygmaeus Gray, Am. Jour. Sci. II. 
33: 239. 1862; Macronema pygmaeum Greene, Erythea 2: 73. 
1894. 
STUDIES IN THE COMPOSITAE. 
~ Coleosanthus venulosus, n. sp.—A low shrub 34" or less high, 
freely branched, the stems whitened with irregularly furrowed 
bark: leaves glabrous, sprinkled with microscopic (waxy?) pat- 
ticles, subsessile, triangular-deltoid, rather thin, with narrow 
prominent reticulate veins, the base truncate or subcordate, 
sharply acute or even acuminate at apex, cuspidately few-toothed 
on the margins, often subcrenate, generally less than 2™ long, 
mostly on the herbaceous branchlets which terminate in slender 
monocephalous peduncles: heads about 14™™ high and fully as 
broad: involucral bracts minutely granular-puberulent as are also 
the peduncles, sub-equal, acuminate; the inner linear-lanceolate, 
few-nerved; the outer ovate-lanceolate, 6—10-nerved, usually with 
a subtending bract: flowers numerous: akenes linear, with 10 
minutely hispidulous nerves: pappus strictly capillary, scarcely 
scabrous. 
