Blake — A Revision of the Genus Viguiera 103 
long or less. Heads terminating the erect ultimate branches in 
1’s—3’s, on mostly naked pedicels 1.7-5.7 em. long and densely pilose 
with loose erectish hairs; disk in youth thick-cylindric, 6 mm. 
high, 6 mm. thick, in age depressed-globose, 7-8 mm. high, 9- 
11 mm. thick. Involucre 2-seriate, 5-6 mm. high; phyllaries some- 
what obovate-oblong, very sparsely strigillose and along margin 
sparsely pilose, with ribbed and vittate base and much shorter 
abruptly acute or subacuminate green tip, the inner narrower. 
Rays 5, oval, 6 mm. long; disk-corollas 4.5 mm. long (tube 0.5 mm.), 
appressed-puberulous above. Pales nearly glabrous, abruptly 
cuspidate-mucronate, 7 mm. long. Achene mottled, appressed- 
rusty-pilose, 3 mm. long. Awns very unequal, abruptly scarious- 
margined near middle and appearing trifid, 2-3 mm. long; squa- 
mellae about 6, unequal, irregularly united below and to the awns, 
deeply lacerate, 1 mm. long. — Klatt! in Dur. & Pitt. Bull. Soe. 
Bot. Belg. xxxi. pt. 1. 204 (1892). COSTA RICA: El Rodeo, 
along the Rio Tirribi, 700 m., 28 Dec. 1889, Pittier 1604 (TYPE: 
G.). — T. 2. Fig. 11. 
52. V. mucronata, sp. nov. Annua tenuis caule strigoso apice 
divaricate ramoso capitulis laxe paniculatis, foliis alternis late 
Ovatis vel anguste lanceolatis acuminatis vel attenuatis sparse 
strigillosis in petiolis 6-13 mm. longis insidentibus, disco subgloboso 
6~(fructu)11 mm. diametro, involucri biseriati 3.5-5 mm. alti 
phyllariis lineari- vel oblongo-lanceolatis strigillosis, radiis ca. 10, 
acheniis rufo-sericeis. 
Slender annual, the stem striate, whitish, strigose, at apex 
(when well developed) divaricately branched, about 20-headed 
(in reduced forms fewer-headed), the heads loosely panicled. 
Leaves alternate, broadly ovate to narrowly lanceolate, acuminate 
or attenuate, truncate-rounded at base, cuspidate-dentate (teeth 
about 20 pairs, depressed), thin, sparsely strigillose, 3-nerved, 
6.5-10.5 cm. long, 1.8-6.3 em. wide, the uppermost reduced to 
linear-filiform bracts; petioles strigillose, unmargined, 6-13 mm. 
long. Peduncles slender, densely strigillose, 0.8-3.2 em. long; 
heads subglobose, 1.5 em. wide; disk 7.5 mm. high, 6—(fruit)11 mm. 
wide. Involucre 2-seriate, slightly graduated, 3.5-5 mm. high, the 
phyllaries linear- or oblong-lanceolate, acute to acuminate, below 
indurated, ribbed, and vittate, at apex herbaceous, subdensely 
strigillose. Rays about 10, yellow, oblong, 8 mm. long, 2.5 mm. 
