68 Contributions from the Gray Herbarium 
apex, at base somewhat indurated and costate, on margin and back 
more or less sordid-pilosulous and glandular. Rays 8, oval, 10- 
14 mm. long, 5.5-7 mm. wide; disk-corollas subappressed-pilosu- 
lous, 6 mm. long (tube 1.3 Sai): Pales oblong, mucronate-acute, 
erose at apex, yellowish on margin, sordidly pilosulous and glandu- 
lar on back, 8-9 mm. long. Achenes sparsely appressed-pilose, 5 
mm. long. Awns fimbriate, sometimes trifid, 2.8-3.5 mm. long, 
rather easily deciduous; larger squamellae 4, free, oblong, lacerate- 
riate, about 1.2 mm. long, with about 4 smaller intermediate 
ones. — Blake! Proc. Am. Acad. li. 518 (1916). — MEXICO: 
San Luis Porosi: 1830-2440 m., 1878, Parry & Palmer 467 
(TYPE CoLL.: B. M., G., K., Mo., U.S.); Alvarez, 29 Sept.—3 Oct. 
1902, Palmer 172 (G., Mo., U.S.). 
Series B. Grammatoglossae, ser. nov. Herbae perennes vel 
suffrutescentes, foliis oppositis vel alternis, capitulis saepe majuscu- ~ 
lis, involucri phyllariis 2-5-seriatis gradatis vel subaequalibus 
lanceolatis vel oblongis acutis vel obtusis subherbaceis basi rarius 
leviter vel valde costatis et induratis, pappo interdum nullo. — 
Species typica V. grammatoglossa DC. — Eleven species of Mexico 
and Guatemala, one species extending into the southwestern 
United States. Chiefly distinguished from the other series of this 
section by the phyllaries, which are only slightly or not at all in- 
durated and ribbed below, but through the var. latisguama of V. 
cordifolia the group is closely connected with the Maculatae. 
Species 23-33. 
a. Phyllaries 2—3-seriate, b. 
b. Phyllaries ean 6 acute, c. 
c. Leaves densely silky-canescent beneath. d. 
h, 
d. Pappus present; achenes cl tensa ee ene 25. V. oid apes cent 
d. abe tee bah achenes ra ee, 26. V. bombycina. 
c. Leaves not silky beneath, e 
. ates ensely and soft tly pilosulous beneath... . . , 24. V. mima. 
e. Leaves not softly pilosulous benea th, J. 
Fe Re 2, We ey 23. V. Purpusii. 
Petioles matte 5mm , jong or lem. ... . |... 27. V. cordifolia. 
b. Phyllaries acuminate or attenuate, g- 
es — silky-canescent beneath.......... 29. V. sessilifolia. 
g. Leav metimes densely pilose but not silky be- 
h. Pappus none; achene glabrous 
h. Pappus present; achene pubescent 
t. Leaves short. rt-petioled or ee not abruptly 
contracted into a margined nt ee: Rh V. cordifolia. 
i. Leaves abruptly contracted into a a broadly m 
gined petiole, “thereby appearing sessile . "28. V. rhombifolia. 
