Blake — A Revision of the Genus Viguiera 75 
above in age, hispidulous on tube and veins of throat, pilose-hispid 
at apex, 6 mm. long (tube 0.8 mm.). Pales long-acuminate, 10-— 
11 mm. long. Achenes hispid-villous above, 3.5 mm. long. Awns 
2 or rarely 3, slender, 3 mm. long; squamellae about 6, free, lacin- 
iate, 0.4 mm. long. — Blake, Proc. Am. Acad. xlix. 375 (1913). 
Encelia (§ Geraea) rhombifolia Rob. & Greenm.! Am. Journ. Sci. 
ser. 3. 1. 155 800): Ce Ghiesbreght 
(Par.); dry calcareous hills, Las Sedas, 1830 m., Aug. 1894, 
Pringle 4813 (TypE couu.: B. M., G., K.); near Cuicatlan, Valley 
of Oaxaca, 2075-2380 m., 3 Oct. 1894, EZ. W. Nelson 1530 (G., 
U. 8.); Valley of Oaxaca, 1585-2380 m., 2-3 Oct. 1894, E. W. 
Nelson 1495, 1496, 1535 (U.S.); hills near Tamazulapam, 2380 m., 
13 Nov. 1894, EZ. W. Nelson 1951 (G., U.S.); La Carbonera, 2045 
m., 19 Sept. 1895, L. C. Smith 821 (G.). — T. 3. Fie. 20. 
29. V. sesstuiFoLIA DC. Herbaceous, leafy, simple or slightly 
branched; stem slender, hispid-pilose, bearing 1-6 heads, termin 
and from the upper axils. Leaves mostly alternate, ovate to ovate- 
lanceolate, acuminate, rounded at base, mostly sessile, only the 
lower short-petioled, serrate, densely tuberculate-strigose above, 
beneath subsericeous-canescent with a rather soft hispid pilosity, 3- 
nerved, gradually reduced to bracts above, 2.54 em. long, 1-2.3 
em. wide; petioles of lower leaves 3 mm. long. Peduncles 3-13 em. 
long; heads 2-3.5 em. wide; disk 11-15 mm. high, 11-16 mm. 
thick. Involucre 3-seriate, graduated, 8-12 mm. high, the phylla- 
ries narrowly lanceolate, acuminate, granular-tuberculate and 
canescently hispid-pilose, subherbaceous throughout. Rays 6-8, 
oblong, 6-15 mm. long, 2.5-5 mm. wide; disk-corollas yellow, 
purplish-tinged in age, hirtellous and more or less granulose, 6.5 
mm. long (tube 1.5 mm.). Pales very acuminate, 11 mm. long. 
Achenes silky-pubescent, 6 mm. long. Awns slightly broadened 
below, 5 mm. long; squamellae 6-12, slender, deeply lacerate, 
united at extreme base, 1.2 mm. long. — DC.! Prod. v. 579 (1836) ; 
Gray, Proc. Am. Acad. xix. 6 (1883). Ximenesia hispida HBK.! 
Nov. Gen. iv. 227 (1820). (Not V. hispida Baker (1884).) Simsia 
hispida (HBK.) Cass. Dict. Sci. Nat. lix. 137 (1829); DC. Prod. 
v. 578 (1836); Blake, Proc. Am. Acad. xlix. 395 (1913). Encelia 
hispida (HBK.) Hemsl. Biol. Centr.-Am. Bot. ii. 184 (1881). — 
CO: Zacatecas: Sierra de los Morones, near Plateado, 1 
Sept. 1897, Rose 2736 (U. S.); San Luis Porost: 1878, Parry & 
