BLAKE—REVISION OF FLOURENSIA. 405 
and Malaguefia, Sierra Chica, January 13, 1871, Hieronymus (Ber.). Rfo 
Zeballos, Sierra Chica, January 13, 1878, Galander (B, Ber.). Cérdoba, 
Schuyder (Ber.); September, 1892, Kuntze (Ber., N); Lorentz 664 (Ber.). 
Distinguished from F’. riparia chiefly by the smaller heads with fewer disk florets 
(29 to 40 in F. riparia). Furthermore, F. riparia has looser panicles with longer- 
peduncled heads. 
17. Flourensia riparia Griseb. Abh. Ges. Wiss. Gottingen 24: 196. 1879. 
Helianthus riparia Kuntze, Rev. Gen. Pl. 3*: 157. 1898. 
Branching shrub; branches somewhat resinous, the youngest striate, puberulous; 
leaf blades 6 to 13 cm. long, 1.5 to 5 cm. wide, oblong-lanceolate to oblong-ovate or 
elliptic-ovate, acute to acuminate, acute at base, entire, rather thin, minutely 
puberulous, resinous-granulose, at length subglabrate, somewhat prominulous-reticu- 
late beneath; petioles hirsutulous, 3 to 8 mm. long; heads cymose-paniculate at ends 
of branches, 3.6 to 4 cm. wide, nodding in fruit; pedicels resinous, puberulous, 
practeate, 3 to 5.6 cm. long; disk 1 to 1.2 cm. high, 1.1 to 1.5 cm. wide; involucre 
3-seriate, 5 to 6 mm. high, the phyllaries lance-subulate to lance-ovate, loose, resinous, 
ciliolate, subequal; rays about 10, oblong, 1.4 to 2. cm. long, 3.6mm. wide; disk corollas 
29 to 40, resinous on the teeth, 5 mm. long (tube 0.8 mm.); pales resinous at apex, 
subtruncate, 7 mm. long; achenes flattish, striate, villous-ciliate, sparsely puberulous 
above, 6 to 6.5 mm. long, 2.8 to 3 mm. wide; awns 2, ciliate, slightly widened below, 
unequal, 4 to 4.2 mm. long; squamellae none. 
Type LOCALITY: Passage of the Rfo Turamento, Province of Salta, Argentina. 
SPECIMENS EXAMINED: 
ARGENTINA: Passage of the Rio Turamento, Province of Salta, February, 1873, 
Hieronymus & Lorentz 268 (type; Ber., N, photo. and fragm. G). Sierra 
between El Rincén and Clavisan, fluviatile district of the Rfo del Tala, 
Province of Salta, 1873, Lorentz & Hieronymus (Ber.). 
This species is very closely related to F. campestris, but may be distinguished by its 
larger heads and more numerous disk florets. 
18. Flourensia tortuosa Griseb. Abh. Ges. Wiss. Géttingen 19: 184. 1874. 
Branching shrub, about 2 meters high; younger branches more or less flexuous, 
resinous-granulose, more or less pubescent, 1 to 3-capitate; leaf blades 3.2 to 10.5 cm. 
long, 1.3 to 3 cm. wide, lanceolate to ovate-lanceolate, ovate, or oval, acute to acumi- 
nate or obtuse, sharply mucronate, cuneate or rounded at base, entire, prominulous- 
reticulate (lateral veins 5 to 11 pairs), sparsely resinous-granulose, slightly puberulent 
especially when young, narrowed into scarcely margined petioles 2.5 to 15 mm. long; 
peduncles 1 to 3.8 cm. long; heads 6 to 7 cm. broad; disk 10 to (fruit) 15 mm. high, 
11 to 18 mm. wide; involucre 3-seriate, 7 to 11 mm. high, the phyllaries variable, equal 
or unequal, broadly ovate to oblong, at least the outer with gradually or abruptly 
narrowed lanceolate tips, the inner acute or rarely obtusish, all striate, resinous- 
granular, ciliolate, the inner thinner, erose-ciliate; rays 10, broadly oblong, minutely 
emarginate to deeply bilobed, 1.8 to 3 cm. long, 7 to 10 mm. broad; disk corollas 
glabrous, 4.2 mm. long (tube 0.7 mm.); pales ampliate and resinous above, truncate 
and erose-ciliolate at apex, 1 cm. long; achenes (immature) silky-villous, 6 mm. long; 
awns 2, unequal, slender, sometimes unequally bifid, up to 3.5 mm. long; squamellae 
none. 
Type Locauiry: Between Belén and Yacutula, Province Catamarca, Argentina. 
SPECIMENS EXAMINED: 
Argentina: Fields between Belén and Yacutula, Lorentz 479 (type collection; 
Ber., fragm.G). Yacutula, 1878, Schickendantz 166 (Ber., photo. G); in 1879, 
Schickendantz 4 (Ber., fragm. G). Quebrada de Villavil, 1876, Schickendaniz 
166 (Ber.). Catamarca, 1896, Bettfreund 1125 (Ber.). Department of Andal- 
gal4, 1916, Jérgensen 1273 (G). 
