1900] Fernald, — Two northeastern Thalictrums 233 
petiolulate or subsessile: flowers dioecious, greenish or purplish, the 
panicles 1 or 2 dm. high, with ascending branches: sepals greenish, 
oblong-lanceolate, caducous: carpels 6 to 10, glandular-pruinose ; 
stigmatose style lance-subulate, 3 to 5 mm. long; achenes ovate- 
lanceolate, excluding the persistent style, 4 or 5 mm. long, 2 or 3 
mm. thick, plump, subterete, scarcely compressed or ancipital, with 8 
simple or slightly branched strong ribs, the alternate ones strongest ; 
seed linear-lanceolate, hardly filling the cell.—Alluvial thickets, 
Ontario, Rideau Hall, Ottawa, in flower, August 8, 1894 (John 
Macoun in herb. Geol. Surv. Dept. Canada, no. 2,956): MAINE, by 
the Aroostook river, Fort Fairfield, in fruit, September 19, 1900 
(M. L. Fernald ). 
The characters and eastern stations of the larger plant may 
be summarized as follows: 
T. OCCIDENTALE, Gray. Rootstock slender, elongated: stem 
glabrous, r m. or less high, leafy to the summit, the three to 
six leaves glaucous beneath, smooth or minutely glandular, the lower 
including the long petiole 1 to 2.5 dm. long, the uppermost includ- 
ing the short petiole os to 1 dm. long, those of the inflorescence 
often simple ; leaflets thin, reniform or obovate, with coarse rounded 
lobes, the terminal on slender petiolules, the others short-petiolulate 
or subsessile: flowers dioecious or polygamo-dioecious, greenish 
or purplish, the panicles 1.5 to 3 dm. high, with ascending branches : 
sepals oblong : carpels glabrous or minutely glandular-pruinose ; 
achene excluding the persistent style 6 or 7 mm. long, 2 or 3 mm. 
wide, compressed, strongly ancipital, with three strong somewhat 
branching ribs on each side: filaments, yellowish greenish or pur- 
plish, elongated, slightly clavellate; anthers linear, mucronate. — 
Proc. Am. Acad. VIII. 372. T. dioicum X purpurascens, Tre- 
lease in J. M. Macoun, Can. Rec. Sci, 1894, 77. — NEw BRUNS- 
wick, woods (*flatlands," Fowler’s Catalogue), Eel River, Resti- 
gouche Co., in fruit, July 29, 1876 (A. Chalmers in herb. Geol. 
Surv. Dept. Can. no. 844); South Tobique Lakes, July 18, 1900 
(G. U. Hay); along the St. John river above Woodstock, in flower 
and young fruit, July 3, 1899 (John Macoun in herb. Geol. Surv. 
Dept. Can. no. 21,136); St. John, in fruit, Aug., 1890 (G. U. Hay): 
Maine, thickets by the Aroostook river, Fort Fairfield, in flower, 
June 29, 1899 (Miss E. L. Shaw and others of the Josselyn Botanical 
Society of Maine); MawrroBA, Lake Winnipeg valley, 1857 — pre- 
viously referred to Z. dioicum (Bourgeau): Montana, Wyoming and 
westward. 
GRAY HERBARIUM. 
EXPLANATION OF PLATE 21. — Thalictrum confine, drawn by C. E. Faxon 
from original material. Figs. 1 and 2, fertile plant from Ottawa; fig. 3, flower of 
the same; fig. 4, achene from Fort Fairfield specimen. 
