1910] Tidestrom,— Notes on Peltandra, Rafinesque 49 
specimens of Arum maculatum, which species Linnaeus uses for 
comparison, we might suppose that a narrow-leaved form was at hand 
since the leaves of the latter species are rather narrow and the term 
oblongus as used by Linnaeus and illustrated by him in Philosophia 
Botanica implies an outline (nearly) elliptical in which the relation of 
the major axis to the minor is nearly three to one. Knowing the 
intimate fellowship that existed between Gronovius and Linnaeus 
that the former helped the latter in polishing up the descriptions, 
while the masterly hand of Linnaeus is clearly seen in the descriptions 
themselves, we must take account of the description in Flora Virginica 
as forming part of the concept of the species as held by Linnaeus. ‘The 
descriptions in Flora Virginica and Species Plantarum appear to 
embrace a broad-leaved form,— undoubtedly the typical plant of our 
region. 
Richard, the anonymous author of Michaux's Flora (2: 187. 1803) 
makes the following observation with regard to his Calla virginica 
(Arum virginicum L.) “ Variat foliis angusto-oblongis," which proves 
that at that time the typical form of the species was held to be a broad- 
leaved one. This view is supported by Hooker (Exot. Fl. t. 182, 1827) 
in his description of Caladium virginicum (Arum virginicum L., Calla 
virginica Michx.). He states also: — “This plant appears to have 
been known in our gardens for nearly half a century; yet no figure, as 
far as I know, has yet been published of it." His illustration of the 
plant (l. c.) is an excellent one. 
Peltandra virginica var. heterophylla (Raf.) comb. nov. P. hetero- 
phylla Raf.— To this species of Rafinesque I would refer without 
hesitation the narrow-leaved form collected by Dr. Greene at Mar- 
shall Hall, Md., in 1897, and by the writer in several places throughout 
our region. Hafinesque's description reads as follows:— “ Petiols 
unequal terete, leaves variable oblong cuspidate, or ovatoblong hardly 
sagittate or nearly auriculate or base often entire obliqual, lobes unequal 
rounded short or ovate obtuse." . . . . (Raf. New Fl. N. Am. 1: 88. 1836). 
So far as I know this form is always found with the type. The earliest 
leaves are similar in all the forms: the mature leaves in the type are 
large, 30 em. or longer, palmately 3-ribbed, equilaterally triangular, 
nearly cucullate, i. e. the planes of the lobes form an obtuse and some- 
times a right angle with the plane of the upper part of the leaf: in 
var. heterophylla, on the other hand, the mature leaves are barely 20 
em. in length and rarely 6 cm. in width, 1-ribbed, somewhat sagittate, 
