TABLE OF CONTENTS 
Fertilization and embryogeny in Cephalotaxus For- 
tunet (with five figuresandplateI) - -~ - W. C. Coker 
Toxic limits and stimulation effects of some salts and 
poisons on wheat. Contributions from the Hull 
Botanical eis LXXXVIII (with eels 
four figures) - G. H. Jensen 
Hybridization of wild eee (with des fice - DD. T. MacDougal 
Pollen development in hybrids of Oenothera lata XO. 
Lamarckiana, and its relation to mutation. Con- 
tributions from the Hull Botanical Laboratory. 
LXXXIX (with platesII-IV) - - - Reginald Ruggles Gates 
Development of ovule and female gametophyte in 
inkgo biloba. Contributions from the Hull 
Botanical pat ie XC ts ae V and 
VI) - . Ida Eleanor Carothers 
Morphology of S sciehiattag asks (with seven figures) James Ellis Gow 
Rubiaceae: Anatomical studies of North American 
representatives of Cephalanthus, Oldenlandia, 
Houstonia, i ss see and Galium (with 
plates VII-IX) - - Theo. Holm 
Morphology of the ask i ae of the 
microsporangium of Cycads. Contributions 
from the Hull Botanical Laboratory. XCI 
(with plate X) - — - - Frances Grace Smith 
The formation of intumescences on potato pants 
(with nine figures) - Gertrude E. Douglas 
Gravity as a form-stimulus in tae. Chahburions 
from the Hull Botanical cient 
(with three figures) - - Heinrich Hasselbring 
Ascogenous forms of Gloeosporam and Colleto- 
trichum - C. L. Shear and Anna K. Wood 
Lichen distribution | in the Santa Cus Peninsula, 
A 
California - lbert W. C. T. Herre 
Conspectus generis pares - Camillo Karl Schneider 
_ Ruellia and Dianthera: os eae sud Sos 
three figures and plates XI-XII) - Theo. Holm 
The oS of oo calocoma (with three 
figures) Otus W. Caldwell and C. F. Baker 
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