1916] Fernald & Weatherby,— Puccinellia 11 
serrulate at summit; the midnerve often excurrent and minutely 
scabrous at tip, with a few hairs at base: palea slightly shorter, 
linear-oblong, scarcely tapering to the bidentate or fimbriate summit, 
ciliate to the base he slender hairs of about uniform length: anther 
0.8-1 mm. long: n 2 mm. lon ‘oa rupestris With. 
Pl. ed. 3, ii. 146, 6 (1796). Poa procumbens Curtis, Fl. Lond., 
fase. vi. t. 11 (Exact date of publication not known but probably 
later than Withering’s species. See note below). Sclerochloa pro- 
cumbens Beauv. Agrost. 98 (1812). S. rupestris Britten te ig te 
Journ. Bot. xlv. 107 (1907). Glyceria procumbens Sm Wee 3 Fae 
119 (1824). Festuca procumbens Kunth, Gram. i. 129 re gre 
procumbens Thurb. Bot. Cal. ii. 309 (1880); Beal, Grasses Am. ii. 
575 (1896).— Atlantic coast of Europe; adventive in America. 
Occasionally reported on ballast. Seen by us only from New York: 
ballast, New York, June, 1880, Addison Brown. New JERSEY: 
ballast, Kaign’s Point, D. Burke in herb. Phil. Acad.; Petty’s ida 
July 3, 1867, Burke in herb. Phil. Acad. 
Britten & Rendle give excellent reasons for concluding that Poa 
rupestris With. was published earlier than P. procumbens Curtis:— 
see Journ. Bot. xlv. 107 (1907). In’addition to their reasoning it 
may be noted that Withering, in his original description (ed. 3) states 
merely that the plant was “Gathered on St. Vincent’s Rocks, near 
Bristol, by Mr. Milne, who observed to me that Mr. Curtis first found 
it there.”” In his 4th edition, ii. 147 (1801) he adds, “Sir THomas 
FRANKLAND found this plant growing on the waste ground near the 
Dock, betwixt Bristol and the Hotwells. Also on the new Pier at 
Scarborough.” This additional information is given in Curtis’s 
publication and presumably taken from it by Withering (though he 
makes no acknowledgment) and the natural inference is that Curtis’s 
species was published after Withering’s 3rd edition and before the 4th. 
Also, Withering cites “Curt.” in edition 4, not in edition 3. 
+ + Lemma not coriaceous; its midnerve not excurrent: lower 
branches of the panicle floriferous chiefly above the middle, if below 
loosely flowered and the panicle much elongated (2-3 dm. long): plants 
mostly perennial. 
++ Lemmas and pr abe erose-serrulate or ciliolate. 
= Lemmas truncate-obtuse and erose-ciliolate at the broad tip, with a 
few hairs at base. 
P. pistans (L.) Parl. Fras. 23-27. Culms 2-6 dm. high, rather 
slender: leaves es green, rarely glaucous, 3.5-10 em. long, 2~6 mm. 
flat: panicle green or violet-tinged 0.8-2 dm. long, ovoid, lax; the 
