New Species of South American Plants 159 



Liabum biattenuatum. 



Canescent throughout except the upper leaf-surfaces, which 

 are deep-green and finely and conspicuously reticulata. Stems 

 loosely twining, 2 to 3 m. long, the branches slender, the upper 

 internodes 4 to 5 cm. long. Leaves 8 to 12 cm. long, including 

 the slender petiole, i to 2 cm. wide, linear-lanceolate, gradually 

 acuminate and acute at both ends; obsoletely and distantly 

 serrate, the minute teeth salient; thin. Panicles axillary and 

 terminal, the former about half the length of their leaves, 

 slenderly short-peduilcled, linear-bracted, the heads short- 

 peduncled. Heads 4 to 5 mm. long, the involucre about two- 

 fifths of the length. Young involucres narrowly campanulate, 

 the scales appressed, with broad green middle portions, in about 

 5 series, the outer successively shorter, from ovate and obtuss 

 to lanceolate and acuminate, thick and rigid, the mature in- 

 volucres broadly campanulate, brown, the tips of the scales 

 somewhat spreading. Receptacle slightly convex, alveolate, 

 scarcely scaley, but roughened. Ray- florets and disk-florets 

 each 4 to 6, the ray corollas imperfectly developed, yellow, 

 moderately exceeding the disk, narrow, minutely notched at 

 the summit. Disk-corollas divided nearly half-way, the lobes 

 lance-linear, obtuse. Anthers pals-yellow, slightly exserted, 

 slender, the basal appendages obtuse. Style long-exserted, 

 deeply lobed. Akenes 2 mm. long, slender, broader upward, 

 bristly-hairy. Outer pappus nearly as long as the akene, 

 stouter than the inner, which is abundant, tawny, scabrous 

 and about 6 mm. long. 



"Observed only once, on ridge in edge of forest. Sierra del 

 Libano, 5,500 feet, January 19. " (Herbert H. Smith, No. 2013). 



Mr. Smith has another collection under this number, which 

 may be regarded as a variety. It has shorter and broader 

 leaves, with shorter petioles and distinctly serrate leaves. 



Liabum subumbellatum. 



Stems and lower leaf-surfaces white-floccose, the peduncles 

 and involucres more or less ferruginous. Stems slender, sub- 

 quadrangular, the internodes 10 to 15 cm. long. Leaves 5 to 

 12 cm. long, 2 to 5 cm. broad, lanceolate, gradually contracted 

 into a short petiole-like base, acuminate and acute, obsoletely 

 serrate with very small, distant, sub-salient teeth, dark-green 

 above, white underneath, thin, the venation slender, one or two 

 principal pair about midway between the midrib and the mar- 

 gin. Corymb terminal, few-ilowered, broad and loose, the 

 branches long-peduncled, some with a single head. Heads 3 

 or 4 mm. long, and twice as broad, as pressed, the broadly cam- 

 panulate involucre nearly equaling the pappus, the base lightly 

 impressed. Scales in about 6 series, lanceolate, acute, the outer 



