124 Rhodora [Jury 
Park may belong here: it is described as having “ peduncles 3-5 cm. 
long,...not spirally curved;....fruit ovoid, 1.5 mm. long, with an 
almost sessile stigma." The two specimens in the Gray Herbarium 
marked by Rydberg “R. pectinata” fail to meet these requirements: 
one, from Clear Lake, California, has the peduncles very long and 
extremely spiraled and is referred by us to typical R. maritima; 
the other, from Seattle, Washington, has the peduncles 3-7 mm. long 
and is nearest var. intermedia. 
Var. obliqua seems to stand to true R. maritima in much the same 
relation as does var. rostrata to var. longipes. The Magdalen Island 
material, as stated, is very well matched by authentic Transylvanian 
material; but the Prince Edward Island specimens show an approach 
to var. rostrata. In the Magdalen Islands var. obliqua, which is best 
distinguished from var. rostrata by its plumper shorter-beaked and 
scarcely lunate fruit, occupies some of the brackish pools on Coffin 
Island, while adjacent pools of the same depth and with no obvious 
difference in their conditions are filled by var. brevirostris. So far 
as yet known these saline pools of Coffin Island and some of the salt 
ponds of Prince Edward Island, are the only American localities for 
these two varieties of Ruppia; while neighboring sands and fresh- 
water pools have some other European species or varieties in different 
groups, which are known from no other American region. 
3. Var. INTERMEDIA (Thedenius) Aschers. & Graebn. Syn. i. 358 
(1897) and in Engler, |. c. (1907). R. intermedia Thedenius, Bot. 
Not. (1887) 83. R. maritima, subsp. brachypus, form, Schlegel in 
Hartm. Skand. Fl. ed. 12, 57 (1889).— European specimens referred 
here are fairly well matched by material from Washington and Cali- 
fornia. WasHrNGTON: Seattle, Piper, no. 2863. CALIFORNIA: Pana- 
mint Valley, Coville & Funston, no. 683 (Phil. Acad.). Fras. 5 and 6. 
4. Var. BREVIROSTRIS Agardh in Physiogr. Süllsk. Arsbetr. 6 Maj 
(1823) 37. R. maritima, var. recta Moris, Stirp. Sard. Elench. i. 43 
(1827). R. brachypus Gay in Coss. Notes quelq. pl. Crit. i. 10 (1848). 
R. rostellata B brachypus Marsson, Fl. Neuvorpomm. u. Rüg. 498 
(1869). R. maritima, var. brachypus Schlegel in Hartm. Skand. Fl. 
ed. 12, 57 (1889). R. maritima, subsp. rostellata, C. brevirostris 
Aschers. & Graebn. Syn. i. 358 (1897). R. maritima, subsp. rostellata, 
proles brevirostris Aschers. & Graebn. in Engler, 1. c. (1907). R. mari- 
tima, subsp. brevirostris Briq. Prod. Fl. Corse, i. 57 (1910).— Europe 
and northern Africa. Apparently rare in North America; known to 
us only from the MaGDALEN ISLANDS: brackish or saline pools in salt 
marsh near East Cape, Coffin Island, Fernald, Long & St. John, no. 
6797. See note under var. obliqua. Fras. 7 and 8. 
5. Var.curvicarpa (A. Nelson), n. comb. R. curvicarpa A. Nelson, 
Bull, Torr, Bot, Cl, xxvi, 122 (1899). R, maritima, subsp. spiralis, 
