160 AMERICAN MIDLAND NATURALIST 
Clavis analytica varietatum. 
A. Folia series inferioris folia quaedam in caule altiora super- 
SCL TRENE 5, oP hey ee RY eet yues, .I. var. superscandens 
A. Nullum folium inferius quidquam in caule altius folium 
superscandens. 
a. Folia series inferioris ampla, longi-petiolata, valde remota 
b. Caulis -simplex. 
c. Flores subsessiles vel pedicellis 
brevibus longioribusve, adscen- 
GemeIDUSH ec ees eho. ee ..2. var. praecellens 
c. Flores pedicellis reclinatis... 3. var. nictitans 
b. Caulis ramosus, floribus ramorum 
sessilibus vel brevi-pedicellatis........4. var. ramea 
a. Folia series inferioris amplitudinem mod- 
icam neque petiolos tam longos praebentia, 
Magis mMinusve remota. os< v.30 cee ae 5. var. porrecta 
a. Folia series inferioris linearia vel lineari- 
lanceolata, amplitudinem modicam, petiolos 
angustos, nonnihil breves praebentia, nec 
non appropinquata. 
be .sGaulis? simplex a: Re Oi. eS 6. var. propinqua 
b. Caulis partibus usque 4 superioribus 
Qe SE AMIOSUS. S Note aie eet ae een 7. var. brachiata 
a. Folia linearia, brevia caule toto usque 
inflorescentiam conferta, infima petiolis brev- 
ibus, cetera omnia sessilia. 2 
b. Flores brevi-pedicellati vel sub- 
sessileg Yep ret ucies Cone. ine eeree 8. var. Chandonnetir 
b. Flores in pedicellis mediocribus positi..9. var. obesa 
Key of varieties. 
A. Leaves of the lower series overtopping some 
leaves borne higher up on the stem........ I. var. superscandens 
A. No lower leaf overtopping any borne higher on ; 
the stem. 
a. The leaves of the lower series large, long- 
petioled and very distant. 
b.. “Stemsimple:. 
c. Flowers subsessile, or on short or 
rather long, ascending pedicels.2. var. praecellens 
ahh 
