94 Contributions from the Gray Herbarium 
wide, on petioles 0.9-2.5 cm. long; stem-leaves few (3-6), much 
smaller, distant, usually alternate, passing into the lance-linear 
bracts of inflorescence. Heads 3-4, 4.5-6 cm. wide, on peduncles 
3-11 em. long; disk 9-15 mm. high, 17 mm. thick. Involucre 2- 
seriate, 6-9 mm. high, the phyllaries very densely lanate-tomentose, 
linear-lanceolate, with slightly broadened and ribbed base, the longer 
apex herbaceous. Rays about 18, sometimes styliferous but sterile, 
17-25 mm. long, 3.5-6 mm. wide; disk-corollas pilose, 5.5 mm. 
long (tube 1.5 mm.). Pales abruptly acute, pilose on back above, 
7 mm. long. Achenes (immature) silky-pilose. Awns slightly 
broadened below, 2.7 mm. long; squamellae about 6, free, 1 mm. 
long. — Gray! Proc. Am. Acad. xvii. 218 (1882). Bahiopsis lanata 
Kellogg, Proc. Calif. Acad. ii. 35 (1863). — LOWER CALIFOR- 
NIA: Cedros Island: 1875, Streets (G., U. S.), May 1881, Belding 
(G.), Dec. 1888-Feb. 1889, Lieut. C. F. Pond (U. 8.), Mar. 1889, 
Palmer 743 (G., K., U.8.), 1897, Anthony 279 (G., K., Mo., U.S.), 
10 March 1911, Rose 16115 (U.S8.). 
42. V. potosina, nom. nov. Herbaceous, decumbent or ascend- 
ing, 5-6 dm. high or more, sparsely branched or subsimple, the 
stem in youth canescently pubescent with incurved, retrorse, or 
spreading hairs mixed with few long widely spreading hairs, in age 
becoming subglabrate, naked above. Leaves opposite throughout, 
ovate, acute or acutish, at base truncate-rounded or slightly cor- 
date, entire, triplinerved, above dull green or subcanescent, rather 
densely tuberculate-strigillose but not scabrous, beneath densely 
and rather softly canescent-pilose with appressed hairs, 3.5-9 em. 
long, 1.5-5.3 cm. wide, the upper gradually smaller; petioles naked, 
canescent-pubescent and long-pilose, 1-2.5 cm. long. Heads 
1.7 cm. wide or less, in close panicles of 3-14 at apex of long (2 dm. 
or less) naked axillary and terminal peduncles of unequal length; 
pedicels 4 cm. long or usually much less; disk 6-8 mm. high, 
6-10 mm. thick. Involucre 2-seriate, scarcely graduated,’5 mm. 
high, the phyllaries lanceolate, canescently hispidulous and sub- 
ciliolate, with ovate-lanceolate indurated about 3-vittate pale base — 
and shorter narrow subappressed or spreading acuminate her- 
baceous apex. Rays about 8, 5 mm. long, 1 mm. wide; disk- 
corollas rather densely puberulous, 5.5 mm. long (tube 1 mm.)- 
Pales somewhat trifid toward the hispidulous apex, subcuspidate, 
5-6 mm. long. Achenes in age rather strongly thickened, sub- ~ 
