1914] Fernald and Wiegand,— The Genus Ruppia 123 
A. Carpels ovoid, slightly oblique but not strongly eccentric nor curved, 
bluntish or not tapering to a conspicuous beak. 
Peduncles in maturity 1-3 dm. long, strongly spiraling toward the base: 
podogynes 0.7-3 om. long o a eS 1. R. maritima 
Peduncles in maturity less than 6 em. long, rarely spiraling. 
Peduncles 1.5-6 em. long: podogynes 0.6-2.5 cm. long. 
2. var. obliqua 
Peduneles 2-10 mm. long: podogynes 1-6 mm. long. 
Podogynes distinctly longer than the carpels. 3. var. intermedia 
Podogynes shorter than or about equaling the mature carpels. 
4. var. brevirostris 
A. Carpels strongly eccentric and distinctly beaked, or semilunate or curved. 
Mature carpels 2-3 mm. long, shorter than the mostly elongate podogynes. 
Mature podogynes 1-6 em. long. 
Mature podogynes 3-6 cm. long: peduncles long and spiraling. 
5. var. curvicarpa 
Mature podogynes 1-3 (rarely 3.5) em. long. 
Peduncles in maturity 3-30 cm. long, spiraling or flexuous. 
6. var. longipes 
Peduncles in maturity 0.5-3 cm. long, not spiraling. 
7. var. rostrata 
Mature podogynes 2-6 mm. long. 
Mature peduncles 3-7 cm. long........ 8. var. onondagensis 
Mature peduncles 0. a 15m long «^ 9. var. subcapitata 
Mature carpels 1.5 mm. long, exceeding the very short podogynes. 
10. var. exigua 
1. Ruppra maritma L. Sp. Pl. i. 127 (1753). R. spiralis Dumort. 
Fl. Belg. 164 (1827). R. maritima, var. spiralis Moris, Stirp. Sard. 
Elench. i. 43 (1827). R. maritima, subsp. spiralis Aschers. & Graebn. 
Syn. i. 356 (1897) and p Pfanzenr. iv. fam. 11, 142 (1907); 
Briquet, Prod. Fl. Corse, i. 56 “ = R. maritima L., sensu stricto" 
(1910).— Common in Hane and in parts of Africa and Australasia, 
and said by Ascherson and Graebner to be “in Nord- und Siidamerika 
verbreitet." We have seen American material which seems referable 
to true R. maritima only from CarironNiA: Clear Lake, Ayres. Fics. 
1 and 2. 
2. Var. OBLIQUA (Schur) Aschers. & Graebn. Syn. i. 357 (1897) 
and in Engler, l. c. 145 (1907). R. obliqua Schur ex Griseb. & Schenk, 
It. Hungar. in Wiegm. & Erisch. Arch. xviii, 355 (1852). R. transsil- 
vanica Schur, Osterr. bot. Zeitschr. x. 356 (1860).— Southeastern 
Europe. Authentic specimens fairly matched by material from the 
Magdalen Islands and Prince Edward Island. MAGDALEN ISLANDS: 
brackish or saline pools in the salt marsh near East Cape, Coffin 
Island, Fernald, Long & St. John, no. 6795. Prince EDWARD 
IsLAND: saline water of South Lake and adjacent pools, Bothwell, 
Fernald, Long & St. John, no. 6800. Fics. 3 and 4.— Rydberg’s 
R. pectinata, Mem. N, Y. Bot. Gard. i. 15 (1900) from Yellowstone 
