1914] Fernald and Wiegand,— The Genus Ruppia 127 
long; the podogvnes 1-6 mm. long: fruiting carpels 2-3 mm. long, 
2» . d . Š 
ovoid-semilunate, gibbous at base, prominently and subobliquely 
beaked.— Brackish or salt water, Quebec to Massachusetts. QUEBEC: 
Seven Islands, Saguenay Co., August 14, 1907, C. B. Robinson, no. 
916. Prince Epwarp IsLAND: pools in salt marshes, Tignish, August 
6, 1912, Bunbury, August 28, 1912, Fernald, Long & St. John, nos. 
6799 (transitional to var. rostrata), 6796. MassacHUsETTs: Salem, 
J. L. Russell; Mystic River Marshes, August 21, 1881, F. S. Collins; 
Hadley Harbor, Naushon Island, July, 1911, B. M. Duggar (TYPE in 
Gray Herb.). Fras. 17 and 18. 
Var. subcapitata in its short peduncles and podogynes closely 
simulates var. brevirostris but in the form of its fruit is much nearer 
var. rostrata. Most of the material (all from Massachusetts) has the 
podogynes less than 3 mm. in length; but one of the Prince Edward 
Island collections (no. 6799 from Tignish) has them longer (up to 
6 mm.) and more slender, thus simulating var. intermedia. Its 
prominently beaked and semilunate fruit places it close to var. sub- 
capitata and without the support of a larger suite of specimens it can- 
not well be given varietal separation. 
10. Var. exigua, n. var., humilis repens; pedunculis 2—4 mm. longis; 
podogynis 0.5 mm. longis; carpellis maturitate; 1.5 mm. longis semi- 
lunatis prope erostratis. 
Dwarf, repent: peduncles 2-4 mm. long: podogynes 0.5 mm. long: 
carpels 1.5 mm. long in fruit, semilunate, almost beakless.— New- 
FOUNDLAND: shallow tidal pools in salt marsh, Norris Arm, August 
21, 1911, Fernald & Wiegand, no. 4497. Fras. 19 and 20. 
In its tiny almost sessile essentially beakless fruit var. exigua 
suggests the most dwarfed extremes of var. brevirostris, but by the 
outline of the fruit it is clearly more related to vars. rostrata and 
subcapitata. 
ZXPLANATION OF PLATE 110. 
Fruiting peduncles X 1 and mature earpels X 4. Figs. 1 and 2. Ruppia 
maritima, after Reichenbach, Ic. Crit. ii. t. 174; figs. 3 and 4, var. obliqua, 
from a Transylvanian specimen, coll. Janka; figs. 5 and 6, var. intermedia, 
Seattle, Washington, Piper, no. 2863; figs. 7 and 8, var. brevirostris, Coffin 
Island, Magdalen Islands, Fernald, Long «€ St. John, no. 6797; figs. 9 and 10, 
yar. curvicarpa, Laramie Alkaline Lakes, Wyoming, Nelson, no. 2821 (cotype); 
figs. 11 and 12, var. longipes, Sasachacha Pond, Nantucket, Massachusetts, 
Dame, Jenks & Swan; figs. 13 and 14, var. rostrata, from the original figures of 
R. rostellata (Reichenb. Ic. Crit. it. €. 174); figs. 15 and 16, var. onondagensis, 
Salina, New York, J. A. Paine (type); figs. 17 and 18, var. subcapitata, 
Naushon Island, Massachusctts, B. M. Duggar (type); figs. 19 and 20, var. 
exigua, Norris Arm, Newfoundland, Fernald & Wiegand, no. 4497 (type). 
