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TABLE OF CONTENT=. 
Spermatogenesis and oogenesis in Ephedra trijurca. 
pee from the Hull Botanical Labora- 
LIX (with plates I-V). - W. J. G. Land 
The am relation of Puccinia asparagi. a contri- 
bution to the biology of a plate seni 
(with twenty-one-figures) : - Ralph E. Smith 
Delta and desert vegetation (with seven ‘apt’ - D.T. MacDougal 
Oogenesis in Vaucheria. Contributions from the Hull 
Botanical te nee LXI vias a VI 
and VII) - Bradley M. Davis 
A study of Tillandsia sachets vith one figure an 
plates VITI-XI) Frederick H. Billings 
Biological relations of certain sue see 1. The 
creosote bush (Covillea tridentata) in its rela- 
tion to water supply (with seven figures) - — - V. M. Spalding 
The development of the central cylinder of Araceae 
and Liliaceae. Contributions from the Hull 
Botanical Laboratory. LXII oe Pies XII- 
Mintin Asbury Chrysler 
The iia 2 ee sclgiianeldi of Monoclea. 
Contributions from the Botanical Laboratory 
of te Johns Hopkins ore No. 2. as 
plates XVI and XVII) - Duncan S. Johnson 
On the spores of certain Coniferae vith twenty -four 
res) - W. C. Coker 
The relationships of iu organs in platith end: 
butions from the Hull Botanical oe 
LXIII - - Bradley M. Davis 
A lichen eset of a asi aetatie ee (with sie ne 
ures Bruce Fink 
Transpiration of sun- oe kd a oon “f Olea 
europaea and other broad-leaved evergreens 
(with eleven figures) = - - Joseph Y. Bergen 
A fossil Sequoia from the Sierra Meads vith plate 
XVIII and XIX) -~ - - Edward C. Jeffrey 
Place-constants for Aster prenaataie Ciaieline 
tions from the Hull Botanical eae 
LXIV (with eighteen figures) - George Harrison Shull 
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