146 Contributions from the Gray Herbarium 
96. V. oligodonta, sp. nov. MHerbacea infra inflorescentiam 
simplex, caule tuberculato-hispido-piloso pilis patentibus demum 
deciduis, foliis anguste lanceolatis acuminatis basi acutis sub- 
integris vel remote serratis supra tuberculate-strigosis subtus 
vix pallidioribus sparse subhispidulo-pilosulis 5.8-8.9 cm. longis 
6.5-10 mm. latis, capitulis 2-3, 3-4 em. latis, involucri 4-seriati 
gradati 8-9.5 mm. alti phyllariis lanceolatis vel oblongo-lanceolatis 
acutis vel acuminatis basi firme induratis costatis supra abrupte 
herbaceis tuberculato-strigillosis et hispido-ciliatis appressis vel 
exterioribus.sublaxis, acheniis subsparse pilosis, pappi squamellis 
liberis. 
Erect, herbaceous, simple below the inflorescence, 1.3-2 m. high, 
the stem purplish or pale, slender, striatulate, tuberculate-hispid- 
pilose with spreading at length deciduous hairs. Leaves alternate, 
narrowly lanceolate, acuminate, callose-mucronate, acute at base, 
subentire or distantly serrate (teeth 4-8 pairs, depressed), tripli- 
nerved and featherveined, very slightly revolute, above green, 
tuberculate-strigose, beneath scarcely paler, sparsely subhispidu- 
lous-pilosulous and gland-dotted, along the midrib rather softly 
pilose, the hairs scarcely tuberculate-based, 5.8-8.9 cm. long, 
6.5-10 mm. wide; petioles tuberculate-hispid-pilose, 2 mm. long. 
Heads 2-3, on terminal and axillary naked or bracteate tuberculate- 
hispid-pilose peduncles 3.5-6.5 cm. long; disk 1 em. high, 1.2-14 
em. thick. Involucre 4-seriate, graduated, 8-9.5 mm. high, the 
phyllaries lanceolate to oblong-lanceolate, acute to acuminate, 
callous-mucronate, at base firmly indurated and broadly ribbed, 
above abruptly herbaceous, 1-3-nerved, tuberculate-strigillose and 
hispid-ciliate, appressed or the outer rather loose. Rays about 16, 
narrow-oblong, yellow, puberulous and gland-dotted on back, 12- 
14 mm. long, 3.5 mm. wide; disk-corollas yellow, puberulous be- 
low, 4.5-5.2 mm. long (tube 0.8-1.1 mm.). Pales obtuse, minutely 
pubescent above, 7 mm. long. Achenes (very immature) sub- 
sparsely pilose. Awns 2, unequal, slender, ciliate, 2.8 mm. long; 
squamellae about 6, free, laciniate, 0.6 mm. long. — ARGENTINA: 
rane St. Xavier, Tucuman, Tweedie 1202 (rypr: K.., fragm- 
97. V. retroflexa, sp. nov. Herbacea infra inflorescentiam vix 
ramosa, caule infra sparse supra densius tuberculato-strigoso- 
Piloso, foliis lanceolatis vel anguste oblongo-lanceolatis acuminatis 
