TUBER-BEARING SPECIES OF SOLANUM. 505 
2. SOLANUM MAGLIA, Schlecht. ; tuberibus magnis, caule valido, 
foliis distincte petiolatis, foliolis paucijugis ovatis acutis, minutis 
interjectis subnullis, corolle alb: segmentis brevibus deltoideis, 
stylo elongato.—Shore of Chili, down south as far as the Chonos 
Archipelago; also likely Peru. 
9. SOLANUM COMMERSONI, Dunal; tuberibus magnitudine 
mediocribus, caule gracili brevi, foliis distinete petiolatis, foliolis 
5-9 oblongis obtusis vel subacutis, interjectis minutis nullis, 
corolle albæ vel pallide lilacine segmentis lanceolato-deltoideis 
tubo sublongioribus, stylo elongato.— Uruguay, Buenos Ayres, 
and Argentine territory, in rocky and arid situations at a low 
level. 
4. SOLANUM CARDIOPHYLLUM, Lindley; uberibus magnis, 
caule brevi valido, foliis distincte petiolatis atroviridibus glabris, 
foliolis paucijugis ovatis acutis, minutis interjectis nullis, coroll: 
albæ segmentis lanceolato-deltoideis tubo equilongis.— Mountains 
of Central Mexico. 
9. SOLANUM JAMESI, Torrey; tuberibus minutis globosis, 
caule brevi gracili, foliis distinete petiolatis, foliolis 5-9 oblongis 
acutis, interjectis minutis nullis, cymis paucifloris, corolle albæ 
segmentis lanceolato-deltoideis tubo equilongis, fructu globoso. 
— Mountains of South-western United States and Mexico. 
6. SOLANUM OxYCARPUM, Schiede; tuberibus minutis, caule 
brevi gracili, foliis distinete petiolatis, foliolis 9-11 oblongo- 
lanceolatis acuminatis, interjectis minutis nullis, eymis laxis pau- 
cifloris, floribus ignotis, fructu ellipsoideo cuspidato.— Mountains 
of Central Mexico. 
ECONOMIC SUGGESTIONS. 
What Lord Cathcart asked for were any suggestions that a 
botanist might be able to give, founded upon his knowledge of 
the potato-plant and its geographical distribution, that were likely 
to be of practical value to cultivators. In reviewing the subject 
the considerations of this character that occur to me are these :— 
In the first place, it always seems to me that cultivators work 
upon the tacit assumption, if 1 may so express it, that the one 
object in life of the potato-plant is to grow potatoes, and that this 
assumption has no sound foundation in fact or reality. Solanum 
is one of the largest genera in the vegetable kingdom. About 
900 names stand in the botanical books as species, aad Bentham 
and Hooker estimate that probably 700 of these are really 
LINN. JOURN.—BOTANY, VOL. XX. 28 
