288 NORTH AMERICAN FLORA [VoLUME 34 
UNKNOWN SPECIES 
Sortva BarcLayvANA DC. Prodr. 6: 143. 1837. (Gymmnostyles Barclayana Steud. Nom. 
ed. 2. 1: 713. 1841.) ‘This was described from cultivated specimens said to come from 
Central America without indicated locality. The plant was described as having 6-lobed 
achenes. 
21. GYMNOSTYLES A. Juss. Ann. Mus. Paris 4: 258. 1804. 
Low subacaulescent annuals, the internodes of the stem very short. Leaves alternate, 
pinnatifid to tripinnatifid. Heads sessile in the axils of the leaves, apparently discoid, heter- 
ogamous. Involucre rotate or saucer-shaped; bracts in 2 subequal series. Receptacle convex, 
naked. Marginal flowers (functionally ray-flowers) numerous in several series, pistillate, 
without corolla. Style persistent, villous, in fruit forming a spine-like beak; branches short, 
oblong. Disk-flowers few, hermaphrodite but sterile. Corollas villous, with a slender tube, 
gradually tapering into the elongate-funnelform throat; lobes 4. Anthers with obtuse tips. 
Achenes flattened, villose at the apex, bordered by thick corky transversely reticulate wings, 
not cuspidately lobed at the apex. 
Type species, Gymnostyles anthemifolia A. Juss. 
Wings of the achenes not reticulate at the subconic round-shouldered apex; 
leaves bi- or tri-pinnatifid. 1. G. anthemifolia. 
Wings of the achenes reticulate clear to the truncate apex with acute shoulders; 
leaves simply pinnatifid. 2. G. nasturtiifolia, 
1. Gymnostyles anthemifolia A. Juss. Ann. Mus. Paris 4: 262. 
1804. 
Soliva anthemidifolia R. Br.; Less. Syn. Comp. 268. 1832. 
A low subacaulescent annual, branched from the base, the branches usually less than 5 em. 
long, sometimes almost none, hirsute; leaves hirsute, 3-6 cm. long, bipinnatifid into linear or 
linear-oblanceolate, gradually acute, divisions; involucre 8-10 mm. broad; bracts 15-20, lance- 
olate; corollas of the hermaphrodite flowers pubescent, 3 mm. long; tube slender, gradually taper- 
ing into the narrow elongate-funnelform throat; lobes 4; achenes obovate in outline, 3.5 mm. 
long, 2 mm. wide; body puberulent, narrow; wing thick, transversely reticulate, except the 
broadly subconic villous apex; beak 2 mm. long. 
Type Locaity: “‘Australasia’’ [?]. 
DISTRIBUTION: Southern Mexico to Paraguay; adventive in Louisiana and Texas. 
InLustRations: Ann. Mus. Paris 4: pl. 61, f. 1; Tratt. Arch. pl. 57. 
2. Gymnostyles nasturtiifolia A. Juss. Ann. Mus. Paris 4: 262. 
1804. 
Soliva nasturtiifolia DC. Prodr. 6: 142. 1837. 
Soliva urbica Philippi, Linnaea 29: 7. 1857. 
A dwarf annual, subacaulescent, producing offsets; leaves 1-3 cm. long, sparingly 
pubescent, pinnatifid, with 7—9 oblanceolate divisions; involucre 4-6 mm. broad; bracts 12-18, 
linear or linear- lanceolate, sparingly pubescent; hermaphrodite flowers very few; corolla villous, 
2.5 mm. long; tube gradually tapering into the elongate-trumpet-shaped throat; achenes cuneate 
in outline, 2.5-3 mm. long, nearly 2 mm. wide; body puberulent; wing transversely reticulate to 
the truncate apex, which has acute shoulders; beak fully 1.5 mm. long. 
‘TYPE LOCALITY: Buenos Aires. 
Distrisution: North Carolina to Florida; Louisiana; naturalized from South America. 
ILLUSTRATION: Ann. Mus. Paris 4: pl. 61, f. 2. 
