g2 AMERICAN MIDLAND NATURALIST 
CLAVIS ANALYTICA VARIETATUM. 
A. Series foliorum inferior infimam tantum partem 
caulis prope tuber occupans. oe see .. 12, Vat. BASTE ARTS: 
A. Series foliorum inferior Perea usque ae ae 
midiam partem caulis quae infra inflorescentiam 
ad tuber pertinet occupans. 
(a) Folia series inferioris folia eiusdem series 
in. caule altiora vel folia series superioris in- 
(MINA ASU pPeremMinentianw seh oly oie Rie a see 2. var. SUPEREMINENS. 
(a) Folia series inferioris ad folia series 
superioris abruptissime gradientia, nullum 
autem folium quidquam in caule altius folium 
SUpPerenineilst weet vs Bidide Oe b OO ia  WENES IER MECIDIS). 
(a) Folia series alse seis eal ita & series super- 
ioris abruptissime non gradientia. 
(b) Folia series inferioris ampla, longi- 
petiolatayswaldesnemOotar een ere ae etree 4. var. PRAESTANS. 
(b) Folia series inferioris amplitudinem 
modicam neque petiolos tam longos prae- 
bentia, magis minusve remota. 
(@)holiay pulbescenttialiy ar sexual 5. var. MULTIPLEX. 
(Gx pPoltaeolalbrarta serene. seit tena omer 6. var. PERUSTA. 
(b) Folia series inferioris amplitudinem 
modicam, petiolos breves, angustos prae- 
bentia, nec non appropinquata...5..!..... 7. var. ANGUSTATA. 
(b) Folia series inferioris brevia, lata, 
breviter et late petiolata, appropinquata.........8. var. OPIMA. 
KEY OF VARIETIES. 
A. The lower series of leaves occupying only the 
lowest part of the stem, close to the tuber.../.......... 1. vat. basilaris. 
A. The lower series of leaves occupying one-third 
to one-half of that part of the stem reaching 
from beneath the inflorescence to the tuber. 
(a) The leaves of the lower series overtopping 
the leaves of the same series born higher up 
on the stem, or the lowest leaves of the upper 
SOHLES Jia thts Beinn Rica wha Sane is eusachee ieBa ae 2. var. snpereminens. 
(a) The leaves of the lower series passing very 
abruptly into the leaves of the upper series, 
but no leaf reaching above any leaf born | 
higher up ion: the ratems it so8 Fate to Tok, ene 3. var. praeceps, 
