Blake — A Revision of the Genus Viguiera 161 
paler beneath, 1.5-2.5 cm. long, 4-6 mm. wide, on petioles 1-2 mm. 
long. Heads 1-4, terminating stem and branches, about 2 em. 
wide; disk 9-10 mm. high, 6—(fruit)15 mm. thick; peduncles 
short, densely tuberculate-hispid-pilose with spreading hairs. 
Involucre 2-3-seriate, subequal, 5-6 mm. high, the phyllaries 
narrowly oblong to oblong-lanceolate, obtuse to acutish, with 
short somewhat indurated and ribbed base and more herbaceous 
subappressed or slightly loose apex, in youth densely spreading- 
hispid-pilose and hispidulous-pilosulous with dull hairs, in age 
becoming glabrate below. Rays about 8, oblong, yellow, 6 mm. 
long, 2 mm. wide; disk-corollas yellow throughout, hispidulous 
chiefly at base of throat and on teeth, 4.5 mm. long (tube 1 mm.). 
Pales acute to shortly acuminate from a 3-toothed apex, hispidu- 
lous-pilosulous above on back, with dark midrib, 6-7.5 mm. long. 
Achene in age somewhat thickened, mottled, rather densely ap- 
pressed-pilose, 5 mm. long. Awns slender, strigose, 3.5 mm. long; 
squamellae 4, fimbriate, united at extremest base, 1.5 mm. long. 
— Tithonia pusilla Gray ! Proc. Am. Acad. v. 124 (1861-62); not 
Viguiera pusilla Less. ex Baker in Mart. Fl. Bras. vi. pt. 3. 194 
(1884), as syn. of Aspilia pusilla Baker.— PERU: Obrajillo, 
1838-42, U. S. Exploring Expedition under Wilkes (rypEs: G., 
U. §.).— Undoubtedly a dwarfed state of a larger plant, but 
clearly distinct from its nearest relative, V. simsioides Blake. — 
T. 2. Fig. 26, T. 3. Fie. 13 
Series E. Bracteatae, ser. nov. Herbae perennes, foliis ovalibus 
ad linearibus sessilibus vel subsessilibus, capitulis 1-2 saepe ma- 
jusculis, involucri 3-5-seriati valde gradati phyllariis valde indura- 
tis costatis et vittatis apice saepe abrupte herbaceis. — Species 
typica V. bracteata Gardn. — Erect perennials of Brazil and Para- 
emg with mostly sessile alternate or opposite leaves and rather 
ge or medium heads; involucre strongly graduated, 3-5- 
seriate, the phyllaries very strongly indurated, ribbed, and vittate 
almost to apex, or with abrupt herbaceous tip. Sp. 114-127. 
a. Leaves linear to linear-oblong or -lanceolate, b. 
hispid 
ee se eee ee ee ee eee 

Oxo 
R 
itz 
pd 
S 
Co 
a) 
i 
3) 
co 
z 
igs dome Diem tek | lucre 4-seriate, 6-8.5 mm 
' iate 
me oe ee low; ee ae ie oo mee ‘ 2 eile 119. y. amphichlora. 
d. Stem tuber: ulate-strigill below; involucre 
State, 8-10 ium hen Eta re 120. V. imbricata. 
ie 
