TABLE OF CONTENTS. 
oti Undescribed plants from Guatemala (with plates I, II, ee 
¥a,y XXIV-XXVI).- : Fohn Donnell Smith. 1, 255 — 
‘n the color description of flowers ¥. H. Pillsbury. 5. 
chenema, protonema and metanema 
Conway MacMillan. 490% 
Mutualistic symbiosis of algz and bacteria with Cycas : 
revoluta (with plates III & IV) Albert Schneider. 2 Ba 
Botanical notes from Bainbridge,Ga. August F. Foerste. 33 
On the genus Naegelia of Reinsch (with plate v) . ne 
Roland Thaxter. 49 | 
On some species of Micrasterias crud plate VI). ei 
Lica: Shteon. 
On the development of the bulb of ies -tongue (with 
plates VIl& VII)  . . Frederick H. Blodgett. 
Noteworthy anatomical and ee researches — 
66, 284, 327, $00 
The function of the secondary tissues in arborescent 
monocotyledons . Theo. Holm. — 
The réle of the pericycle in the ‘root of. Dracaena 2 
pinata <.. ; : co. Holm, 
Vegetable ferments © x. BS Bay. a 
Equiseta in the carbonifetous aun ad Whit fee 
The mechanics of growing plants 
D. Tr. MacDougal. 
The fixation of free nitrogen by pati ove 
Pe Seow Rassolh: 
The influence of traction upon the growth of plants | 
. Heald. 
Nourishment of the embryo and the ienpadiaee of 
the endosperm in viviparous teal ots plants 
eee Fe RS. 
