10 Rhodora | JANUARY 
that the Kalm specimen had divided leaves. On this basis the 
writer is using the name L. canadensis L. as synonymous with and 
antedating L. elongata Muhl. 
L. Steelei Britton, like L. Morssii Robinson, combines characters 
of L. canadensis and L. spicata. These are probably hybrids of the 
two species last mentioned. The achene in both is 3-5-ribbed and 
tapers to a short stout beak as in L. spicata, but the pappus in both 
is pure white. However, the leaves in the various specimens fluctu- 
ate in form between the two species. 
a Leaves with linear-faleate, usually entire lobes; upper unlobed leaves 
(if any) linear or linear-lanceolate b 
b Leat-base sagittate or auriculate..............0c ces eeevees var. typica. 
b Leal-hase tapering, not sagittate. 0.0... 0 nse cee eee f. angustipes. 
a Leaves with broadly faleate, or obovate and obliquely truncate, entire 
or toothed lobes; upper leaves similar or unlobed and lanceolate or ovate- 
lanceolate, rarely oblanceolate or obovate, entire or rarely toothed c 
CEN DASO isglilise GINMDDE..... Ever dba o ennt v A var. latifolia. 
c Leaf-base tapering, not sagittate................0.000. f. exauriculata. 
a Leaves all unlobed, lanceolate, oblong, oblanceolate or obovate, entire 
or denticulate, the lowest sometimes shallowly lobed d 
d Cauline leaves lanceolate to ovate-lanceolate, entire or rarely toothed e 
€ Leaf-base sagittate, clasping...............0.e00eee var. integrifolia. 
€ Leaf-base tapering, not sagittate............. 0.000 eee f. angustata. 
d Cauline leaves oblanceolate or obovate, usually toothed f 
f Leaf-base sagittately clasping...................... var. obovata. 
y Leat-pase tapering, not samttate. s. aaa TRE VIN f. stenopoda. 
L. CANADENSIS var. typica var. nov. L. canadensis L. Sp. Pl. 
ed. 1, ii. 796 (1753). L. elongata Muhl. in Willd. Sp. Pl. iii. 1525 (1804). - 
L. elongata x longifolia T. & G. Fl. N. A. ii. 496 (1843). Sonchus 
pallidus Willd. Sp. Pl. iii. 1521 (1804). L. canadensis Robinson & 
Fernald in Gray's Man. ed. 7. 866 (1908) in part.—Foliorum seg- 
mentis lineari-falcatis plerumque integris, basi sagittatis amplexi- 
caulibus; foliis superioribus rariter elobatis et linearibus vel anguste 
lanceolatis.—Quebec and Prince Edward Island to Saskatchewan, 
south to Massachusetts, New York, Illinois and Missouri; also oc- 
casionally on the Pacific Coast where probably introduced. 
Var. TYPICA forma angustipes f. nov., foliis basi angustatis nec 
sagittatis nec auriculatis.—4A sporadic form seen from Central New 
York, but probably occurring elsewhere. TYPE SPECIMEN: Shel- 
drake, Cayuga Co., New York, 1919, Eames & Wiegand, in Herb. 
New York State College of Agriculture. 
Var. LATIFOLIA O. Kuntze Rev. Gen. i. 349 (1891). L: elongata 
Ell. Bot. S. C. & Ga. ii. 252 (1822). L. canadensis Robinson & 
Fernald in Gray’s Man. ed. 7. 866 (1908) in part.—Prince Edward 
Island to Wisconsin, south to Florida and Oklahoma. A common 
form in the Middle Eastern States. 
