118 INDEX TO AMERICAN BOTANICAL LITERATURE 
Harvey, E. M. Is it maltose or phloridzin that is abundant 
in apple tissue? Am. Jour. Bot. 10: 288-293. 2 J1 1923. 
Harvey, R. B. Cambial temperatures of trees in winter and 
their relation to sun scald. Ecology 4: 261-265. f. 1-4. 
7 Au 1923. 
Heald, F. D. & Boyle, L. W. Further notes on the relation of 
the spore load to the per cent of stinking smut appearing 
in the crop. Phytopathology 13: 334-337. 28 JI 1923. 
Heppner, M. J. The factor for bitterness in the sweet almond- 
Genetics 8: 390, 391. Jl 1923. 
Hollick, A. Cycads, living and extinct. Jour. New York Bot. 
rd. 24: 135-140. Jl 1923. [Illust.] 
- Hollick, A. The taxonomic and morphologic status of Ophio- 
glossum Alleni Lesquereux. Bull. Torrey Club 50: 207- 
214. pl. 10-12. 6 Jl 1923. 
Holm, T. Chenopodium ambrosioides L—A morphological 
study. Am. Jiour. Sci. 206: 157-167. Au 1923. 
— C.J. Notes on the Desmids of New York. Torreya 
: 59-62. Au 1923. 
ee E. Die Stellung der Uredineen und Ustilagineen im 
System der Pilze. Osterr. Bot. Zeitschr. 72: 164-180; 
302-304. Au 1923. 
Johnson, A. M. Cryptomorpha, a new section of Saxifraga. 
Am. Jour. Bot. 10: 294-296. f. 1, 2. 2 Jl 1923. 
Based on Saxifraga eriophora S. Wats. from Arizona. 
Johnston, I. M. Studies in the Boraginaceae. Contrib. Gray 
Herb. II 68: 43-80. 18 Au 1923. 
Includes new species in Antiphytum (2), Cryptantha (2), and Plagio- 
bothrys (1). 
Johnston, I. M. Diagnoses and notes relating to the spermato- 
phytes chiefly of North America. Contrib. Gray Herb. 
II 68: 80-104. 18 Au 1923. 
Includes Halliophytum and Eremonanus, gen. nov., and new species in 
Lilium (1), Alternanthera (1), Astrocasia (1), Cnidoscolus (2), Ditaxis (1), 
Jatropha (1), Manihot (2), Penstemon (1), Hymenopappus (2), Gnaphalium 
(6), and Eremonanus (1). 
