46 
Var. PANORMITANUS (Biv). Morong. 
P. Panormitanus, Biv. Sic. Pl. (1806-7). 
Uppermost leaves subcoriaceous, spatulate, opposite, divaricate, 
in 1 or 2 pairs, 3-5-nerved, with cross-veins and often covered 
with a chain-like areolation, 4-5 lines long, sloping at base into a 
broad petiole as long as the blade. Collected in pools at Ottawa, 
Canada, by James Fletcher, July 1882. 
Var. POLYPHYLLUS, Morong, Bot. Gaz. v. 51 (1880). 
A dwarf form 3-5 inches high, divaricately branching from the 
base, and very leafy throughout. Leaves very obtuse, 3-nerved. 
Not flowering, but abundantly provided with propagating buds 
which are found on the thickened and hardened ends of the 
branches, and closely invested by imbricated leaves. In a shallow 
pool, with oozy bottom, some distance under water, South Natick, 
Mass. (Morong); Fresh Pond, Cambridge, Mass. (Faxon). 
Var. ELONGATUS, Ar. Bennett. Macoun's Cat. Can. Pl. Pt. 5, 371 
1890 
I have not seen a specimen of this form, but it is thus de- 
scribed by Mr. Bennett in Jour. Bot. for May, 1891, p. 151: 
* This differs from pusillus by the larger size of all its parts and very 
long internodes; leaves remarkably elongated; peduncles stout and 
long; spikes much longer; leaves often quite acute; flowers larger 
in all their parts. Habit of ruZi/us, Wolfg., and so named in speci- 
mens from Hungary in Herb. Mus. Brit" Coll. Macoun, Spallum- 
sheen River, at and above Enderby, B. C. 
Var. STURROCKN, Ar. Bennett, in Hook. Stud. Fl. 435 (1884). 
This form occurs rather rarely in the United States. It is dis- 
tinguished by its delicate, bright green, pellucid leaves, which are 
1-3 inches long, obtuse or often apiculate at the apex and 12-34 
line broad. Mr. Bennett states that the British specimens are 
sometimes 5-nerved, but I have seen none with more than 3 
nerves. There is often, however, at least in American specimens, 
a finely-reticulated space on each side of the midrib. The fruit, 
according to Mr. Bennett, is much smaller than in the type, with 
a short beak. This I have not seen. 
P. pusillus seems to be the central species of a group, being 
approached on the one hand by P. Zateralis, and on the other by 
