RYDBERG: SOLANUM IN MEXICO AND CENTRAL AMERICA 140 
5-7,more or less stalked, aie rounded or obtuse at the base, 
obtuse, acute, or sometimes short acuminate at the apex, I-3 
cm. long, short hirsute wit few-celled hairs on both sides, 
dark-green above, paler beneath, the lower pairs much smal- 
int than the rest; intending small segments rarely present, 
1-3 mm. long; pseudo- stipular leaves lunate, 2-4 mm. long; 
peduncle 1-3 cm. long, puberulent; inflorescence 3-7- 
flowered ; pedicels 1-3 cm. long, articulate above the middle, 
the lower portion puberulent, the upper glabrous; calyx 
sparingly deshbiialbe the tube 2.5 mm. long, the lobes lance- 
olate, acute, 2.5 mm. long; corolla dark bluish-violet, about 
12 mm. broad, the lobes broadly triangular, 3 mm. long, 
broader than long, puberulent without; anthers oblong, cor- 
date ee sees end, 3 mm. long; fruit globose, the mature berry 
unkno 
Type colt at Otinopa, Durango, 1906, Palmer 392 (U.S 
Nat. Herb. no. 571417). 
This is also related to the potato, but is still smaller, the 
corolla only about 12 mm. broad. The leaf-segments are few, 
5 or 7, the intermittent smaller ones usually found in the potato 
and its relatives are practically lacking in this species. No speci- 
mens except the type have been seen. 
4. Solanum Wightianum Rydberg sp. nov. 
erennial, with subterranean stolons and tubers; stem 
herbaceous, about 3 dm. high, striate, pilose with flat, some- 
what ed hairs; leaves on the seedlings or young shoots 
aan the gic I-1.5 cm. long, the blade ovate, 2-3 cm. 
long; leaves of the better developed ‘gon pinnately 3-5- 
foliolate, oe 5 dm. long; rachis wing-margined; leaf-seg- 
ments distinctly petioluled, long-pilose on Picts ides, the 
blade ovate or oval, acute or acutish, that of the terminal 
segment 4—6 cm. long, that of the upper pair A cm. long 
and that of the lower pair if present, 5-15 mm. long; pe- 
_duncle 4-5 cm. long; raceme about 5-flowered; ‘podiotls 2-3 
cm. long, articulate above the middle; calyx white-pilose, 5 
mm. long, the lobes cee lone acute, slightly longer than 
the Soke corolla pentagonal, 14-15 mm. wide, white, 
puberulent without; anthers oblong, 4 mm. long, cordate at 
the base. 
Type grown from tubers, collected by F. S. Lozano near 
Acambaro, Guanajuato, in 1904 (Gray Herbarium). 
This species is named in the honor of W. T. Wight of Washing- 
ton, who has done a good deal of work on the tuber-bearing 
Solanums, and has indicated on the type sheet that he regarded 
it as belonging to an undescribed species. 
