SAGITTARIA HETEROPHYLLA IN DEVON 275 
scales are oval, somewhat compressed, measure about 3-4 mm. 
long, and 2-3 mm. broad, and are arranged not all in the same 
longitudinal row. Perhaps they represent the inecvacia! 
squamules noted by Buchenau_ in Engler, Bot. Jahrb. ii. p. 467 
(1882), and stated by Jared “ ne in Missouri Pawloe 
Garden, Sixth Annual Report, to occur on the petioles of 
tea latifolia Willd., and Si to be found in the case of 
ther 
In one exceptional case a hermaphrodite flower was observed. 
In diwcious specimens the female plant has its scape usually 
rather shorter than the scape of the male plant, and the flowers 
are arranged in only one, or in very few verticils; in monoecious 
oo the scape usually has the upper verticils male and the 
lower ones female. The early-flowering specimens appear to be 
nthe frequently dicecious, and the later ones monecious. 
Cattle do not seem to eat the leaves of the plants left dry as 
the water recedes during the hot weather; they only trample 
them in ee the river to drink 
Our specimens I consider to constitute a variety of the North 
American species, Sagittaria bint Pursh; the references 
and synonymy are as follow 
SaGir ae em HYLLA Pursh, Flora Se wa Sept. (ii.), 
o 
fe 
= 
oO 
() 
Fer 
al 
© 
ou 
ac) 
4 
Phaneg. iii. p. 71, n. 4 (1881 , 
p- 78, n. 2420 ace pea of Schreber ; ms = ertero. 
S. rigida Pursh e work, p. 397, ; J. Sims, Bot. Mag. 
n. 1632, with plate (1814): [J. i Simi th ‘al Rees, artis article, 
no 19% Jor ed G. Smit nn. Rep. Missouri Bot. Gard. vi. p. 49, 
sate 18 (1895); N. L. ‘Britton & A. Brow wn, Ill. Fl. i. p. 90, n. 9, 
fig. 201 (1896) ; Buchenau in Pflanzenreich, iv. 15, pp. 44, 45, 
S. ibosa Donn, Hort. Cantabr, ed. 6, p. 246 (1811), name 
only; quoted by J. Sims and others. 
S. 8 i gittsfola var. 3, <hes 2e g W. J. Hooker, Fl. Bor. Amer. 
ii. p. 167, (May, 1841), in 
(1843), sagittifolia var. rigida Torrey, Fl. St. New York, ii. p. 259 
‘ S. heterophylla var. rigida G. Engelmann, same reference as 
above. 
S. heterophylla var. angustifolia G. Engelmann, same reference. 
S. heterophylla var. elliptica G. Engelmann, same reference. 
The distribution in North America is from Quebec to Minne- 
sota, westwards to Minnesota and Nebraska, and southwards to 
New Jersey, Tennessee, Missouri, and Nebraska ; it grows both 
in stagnant and running waters. 
v2 
