156 Contributions from the Gray Herbarium 
usually lepidote-strigillose on both faces, the swollen hair-bases 
persistent and conspicuous especially above,-2.5-8 cm. long, 
5-13 mm. wide; petioles strigillose, unmargined, 1-3 mm. long. 
Peduncles axillary and terminal, normally monocephalous, 3-20 cm. 
long, naked or bracteate, tuberculate-strigillose and -strigose; 
heads 3-5.5 cm. wide; disk 8-(fruit)17 mm. high, 1.4—(fruit)2.3 em. 
thick. Involucre 3(-4)-seriate, distinctly graduated,.7-10 mm. 
high, its phyllaries lance-attenuate or the inner merely oblong- 
lanceolate and acute, callose-mucronulate, densely and subcanes- 
cently tuberculate-strigillose, slightly indurated and ribbed at 
base, herbaceous above, the tips loose and herbaceous or some- 
times appressed. Rays 10-14, oblong to oblong-oval, 1.1-2.2 em. 
long, 3.8-7.2 mm. wide; disk-corollas puberulous chiefly below, 
6 mm. long (tube 1.3-1.5 mm.). Pales subobtuse, mucronulate, 
strigillose on back, 8 mm. long. Achenes blackish or mottled, 
appressed-pilose, the hairs sometimes rufous, 5—-5.5 mm. long, 
1.8 mm. wide. Awns 3-4 mm. long or less; squamellae 6-10, 
united to middle or nearly to apex, lacerate-fimbriate, 1.5-2.8 mm. 
long. — Baker ! in Mart. Fl. Bras. vi. pt. 3. 222 (1884); Arechav. 
Ann. Mus. Nac. Montevid. vi. pt. 3. 333. t. 70 (1908). Rudbeckia 
densifolia Sm. in Rees, Ency. xxx. no. 10 (1819), ex parte, fide 
Baker, 1. ¢.; not Vigwiera densifolia Baker (1884). Leighia an- 
chusaefolia DC. ! Prod. v. 580 (1836). L. dissitifolia DC. ! 1. ¢. 
581 (1836); not Viguiera dissitifolia Baker, 1. c. 225 (1884). L. 
lomatoneura DC. !1. ¢. 581 (1836). L. immarginata DC. !1. ¢. 581 
(1836). L. stenophylla H. & A. ! Hook. Journ. Bot. iii. 313 (1841)- 
L. Baldwiniana Nutt. ! Trans. Am. Philos. Soc. ser. 2. vii. 365; 
footnote (1841). Viguiera stenophylla (H. & A.) Griseb. Goett. 
Abh. xxiv. 193 (1879); Baker, I. ¢. 221 (1884); Arechav. 1. c. 332 
(1908). Helianthus angustifolius Spreng. (not L.) ex Baker, I. c. 221 
(1884), as syn. H. montevidensis Spreng. ex Baker, |. c. 221 (1884), 
as syn. — Divisible on leaf-form into two entirely intergradient 
varieties, corresponding to V. anchusaefolia and V. stenophylla 
as maintained by Baker. 
Var. genuina: foliis anguste oblongis vel lanceolato-oblongis 
2.6-6.7 cm. longis (2.5-)5-13 mm. latis. — Rudbeckia densifolia 
Sm.1.c. Leighia anchusaefolia, L. dissitifolia, & L. lomatoneura DC: 
lc. L. Baldwiniana Nutt. 1. c. — URUGUAY: near the top of 
Montevideo Hill, Gillies 868 in part (K.); Montevideo, March 
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