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INDEX TO AMERICAN BOTANICAL LITERATURE 103 
Chodat, R. & Hassler, E. Plantae Hasslerianae, soit énumération des 
plantes récoltées au Paraguay. Bull. Herb. Boiss. II. 3: 701-732. 
31 Jl 1903 ; 780-811. 31 Aur1g03; 906-941. 30S 1903; T007- 
1039. 31 O 19033; t097-1127. 5 D 1903. 
Includes new species in Stevia, Eupatorium (4), A@tkania, aspile (4), Verbesina 
(2), Viguiera (2), Spilanthes, Calea (4), Porophyllum, hee Trixis (2), Polycar- 
paea, Physostemon, Serjania, Cardiospermum, Jussieua (2), Mayepea, Menodora, Spi- 
gelia (3), Ceratosanthes, Mariscus, Rynchospora, Alstroemeria, Cypella, Sisyrinchium 
(5), Déoscorea (5), Zaccarum, Pirigueta (4) and Zurnera (2). 
Cockerell, T. D. A. The Colorado rubber plant. Bull. Colo. Coll. 
Mus. I: 1, 2. rr D 1903. 
Description of a new species and two new subspecies of Picradenia, all from Colo- 
do. 
Collins, J. F.  Coradlorhiza innata and Taraxacum erythrospermum in 
Rhode Island. Rhodora, 5: 291, 292. 22 D 1903. 
Collins, J. F.  Woodsia glabella in Maine. Rhodora, 5: 286. 22 D 
1903. 
Cook, 0. F. Four new species of the Central American rubber tree. 
Science, II. 18: 436-439. 2 O 1903. 
A key to all the known species of Castilla ( Castzlloa) is given. 
Crawford, J. Some interesting plants formerly abundant near German- 
town, Pa. Plant World, 6: 286, 287. D 1903. 
Dandeno, J. B. Phototropism under light-rays of different wave- 
lengths. Science, II. 18: 604-606. f. 7, 2. 6 N 1903. 
Daniels, F, The Kent County, Mich., upland plant societies. Science, 
I. 18: 215-217. 14 Au 1903. 
Davy, J. B. Notes on the vegetation of the Transvaal. Science, II. 
18: 696-699. 27 N 1903. 
Denniston R. H. & Werner, H. J. The structure of the stem, root 
and leaf of Aschscholtzia Californica Cham. Pharm. Arch. 6: 113- 
116. fl. 1-3. 1903. 
Dusén, P. Bataes zur Bryologie der Magellanslander, von Westpata- 
gonien und Siidchile. Ark. Bot. 1: 441-466. p/. 18-28. 5S 1903. 
Several new species of Andreaea are described. 
- Dusén, P, Beitrage zur Laubmoosflora Ostgrénlands und der Insel 
Jan Meyen. Bihang Sv. Vet.-Akad. Handl. 27': 1-71. p/. 1-4. 
Igor. 
Includes three new species of Brym from East Greenland. 
én, P. Zur Kenntnis der Gefisspflinzen Ostgrénlands. Bihang 
Sv. Vet.-Akad. Handl. 27°: 1-70. p/. 7-6. 1901. 
