164 Rhodora [SEPTEMBER 
P. AMPHIBIUM L. f. Hartwrightii (Gray) n. comb. P. Hartwrightii 
Gray, Proc. Am. Acad. viii. 294 (1870). P. amphibium var. Hart- 
wrightii Bissell, Ruopora iv. 105 (1902).— Occurring as an emersed 
development on the same rootstock as the typical form, also some- 
times isolated in dry woodlands and peat bogs. — Bissell's paper should 
be consulted for evidence of the ecological nature of the form.— 
Rather open spot in woods, Burlington; swampy spot, Colchester 
(Blake 2455); sandy shore of Hinesburg Pond, alt. 684, Williston 
(2578 part); sandy shore of Malletts Bay (2651, 2652); shore of 
Potash Creek, South Burlington (passing to f. ferrestre). 
*P. AMPHIBIUM L. f. terrestre (Leers) n. comb. P. amphibium var. 
B. terrestris Leers in Willd. Sp. Pl. ii. 443 (1799); not of Gray's Man. 
ed. 1-5, which is P. Muhlenbergii (Meisn.) Wats.— Merely an emersed 
form of the type, with acute leaves very similar to those of P. MuAlen- 
bergii but smaller, and pubescent like that species, but without the 
glandularity of the peduncles characteristic of it.— Meadow, Col- 
chester, 2 August (Blake 2465). 
P. erEctuM L. Queen City Park, in paths, South Burlington. 
P. PENSYLVANICUM L. A form was collected at Essex Junction, and 
later at Swanton, with leaves bearing a red spot as in P. Persicaria L. 
Rumex MEXICANUS Meisn. Waste land near L. Champlain, 
Burlington. 
CHENOPODIUM GLAUCUM L. Lumber yard and railroad yard, Bur- 
lington. 
SALSOLA Kaui L. var. TENUIFOLIA G. F. W. Mey. Near Essex 
Junction railroad station. 
*CERATOPHYLLUM DEMERSUM L. Shallow water in Hinesburg 
Pond, alt. 684, Williston, 7 August. 
CASTALIA TUBEROSA (Paine) Greene. Shallow water in Winooski 
River, Colchester. 
RANUNCULUS ABORTIVUS L. var. EUCYCLUS Fernald. Rocks in 
woods, alt. 660, Williston. 
R. DELPHINIFOLIUS Torr. f. terrestris (Gray) n. comb. R. multifi- 
dus var. terrestris Gray, Man. ed. 5. 41 (1867). R. lacustris var. 
terrestris MacMillan, Metasp. Minn. Valley, 247 (1892). R. delpheni- 
folius var. terrestris Farwell, Ann. Rep. Comm. Parks Detroit xi. 63 
(1900). R. missouriensis Greene, Erythaea iii. 20 (1895).— Merely a 
stranded development, often on the same stem with the typical 
aquatic form.— Colchester, 2 August (Blake 2451, 2461). 
