lv 
CONTENTS 
58. Lithological Factors limiting the Ranges of Pinus Banksiana and 
Thuja-occidentalis. By M. L. Fernaxp. 
59. I. Notes on certain Leguminosae. 
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II. Reclassified or new jeter acl chiefly North American. 
By J. Francis Macsrip 
I. On tropical American Compositae, chiefly Eupatorieae. 
II. A Recension of the Eupatoriums of Peru. By B. L. Roprnson, 
I. Further Diagnoses and Notes on tropical American Eupatorieae. 
II. The Eupatoriums of Bolivia. By B. L. Rosrnson. 
Sable Island, with a Catalogue of its Vascular Plants. With 2 plates. 
By Haro.p St. Joun 
The Gray Herbarium Expedition to Nova Scotia, 1920. With 1 
plate. By M. L. Fernap. 
I. Records preliminary to a general treatment of the Eupatorieae,—I. 
II. The Mikanias of northern and western South America. By B. L. 
RosInson, 
I. The Group of Polypodium lanceolatum in North America. By C. 
A. WEATHERBY 
II. Notes on centaiay: Leguminosae of the Tribe Psoraleae. By J. 
Francis MAcCBRIDE. 
III. Dyscritothamnus, a New Genus of Compositae. With 1 plate. 
By B. L. Roprnson. 
IV. A Revision of the Rocky Mountain Astragali of Subgenus Homa- 
lobus. By J. Francis MAcBRIDE. 
V. Various North American Spermatophytes, new or transformed. 
By J. Francts MAcBRIDE. 
VI. Records preliminary to a general Treatment of the Eupatorieae, 
—II. By B. L. Rosinson. 
66. Polypodium virginianum and P. vulgare. By M. L. Fernatp. 
67. Notes on the Flora of Western Nova Scotia, 1921. By M. L. 
ERNALD. 
68. I. Records preliminary to a a eitag Treatment of the Eupatorieae, 
—III. By B. L. Rosinso 
II. Studies in the Boraginaceae. ‘By I. M. Jounston. 
1. Restoration of the Genus Hackelia. 
2. The Genus Antiphytum. 
