INDEX TO AMERICAN BOTANICAL-LITERATURE 
rials acs 
he aim of this Index is to include all current botanical literature written by 
Americans, published in America, or based upon American material 3 the word Amer- 
ica being used in the broadest sense. 
Reviews, and papers that relate exclusively to forestry, agriculture, horticulture, 
manufactured products of vegetable origin, or laboratory methods are not included, and 
no attempt is made to index the literature of bacteriology. An occasional exception is 
made in favor of some paper appearing in an American periodical which is devoted 
wholly to botany. Reprints are not mentioned unless they differ from the original in 
some important particular. If users of the Index will call the attention of the editor 
to errors or omissions, their kindness will be appreciated. 
This Index is reprinted monthly on cards, and furnished in this form to subscribers 
at the rate of one cent for each card, Selections of cards are not permitted ; each 
subscriber must take all cards published during the term of his subscription. Corre- 
Botanical Club, 
Abrams, L. R. A new Californian Ceanothus. Bot. Gaz. 53: 68. 
17 Ja 1912. 
Ceanothus fresnensis Dudley sp. nov. 
Alexander, S. Outline key of the groups of the genus Helianthus in 
Michigan. Rep. Michigan Acad. Sci. 13: 191-198. f. 1-5. 1911. 
Alexander, S. A retrogressive metamorphosis artificially produced. 
Rep. Michigan Acad. Sci. £3: 198; Ott. 
Allen, R.F. Studies in spermatogenesis and apogamy in ferns. Trans. 
Wisconsin Acad. Sci. 17: I-56. pl: 1-6. O 1911. 
es, O. Two species of Habenaria from Cuba. Torreya 12: 11-13. 
22 Ja 1912. 
Habenaria Brittonae sp. nov. 
Andrews, A. L. Notes on North American Sphagnum—II. Bryologist 
15: 1-9. Ja 1912. 
Bailey, L. W. The fresh water diatoms and diatomaceous earths of 
New Brunswick, Bull. Nat. Hist. Soc. New Brunswick 6: 291-320. 
IOI, 
Bessey, E. A. Thé hammocks and everglades of southern Florida. 
Plant World 14: 268-276. f. 1, 2. [Ja 1912.] 
Bessey, E.A. Root-knot and its control. U.S. Dept. Agr. Plant Ind. 
Bull. 217: I-89. pl. 1-3+f. 1-3. 21 N 10911. 
Birge, W. I. The anatomy and some biological aspects of the “ ball 
moss,” Tillandsia recurvata L. Bull. Univ. Texas 194: 1-24. pl. 
I-I0. 8 Au IQII. 
Blakeslee, A.F., & Jarvis,C.D. New England treesin winter. Storrs 
Agr. Exp. Sta. Bull. 69: 305-576. f. 1-8. Je 1911. [Illust.] 
D. L’Arnold Arboretum. Rev. Hort. 84: 28-32. f. 7-9. 16 
Ja 1912, 
133 
