: 
7 
; 
3 
] 
1898] SOCIETY FOR PLANT MORPHOLOGY AND PHYSIOLOGY 115 
15. Contributions to the morphology and biology of the Cactacea. 
Port I—The comparative morphology of the embryos and seed- 
lings: Dr. W. F. Ganone, Smith College.— This paper is a con- 
tinuation of the author’s earlier studies upon this family. It 
describes and figures germinated embryos of most of the genera 
and many important species, discusses the germination and 
growth of the embryos, their form- size- and color-factors, and 
the features they show of importance for the determination of 
the phylogeny of the genera, the development of the seedlings, 
and the unfolding of the peculiar morphological features of the 
adult plants. 
16. The morphological significance of the lodicules of grasses: 
De. W. W. RowLeE, Cornell University — A study of the flowers 
of the bamboos leads to the conclusion that the lodicules of 
grasses represent a reduced perianth. The three lodicules in 
the flower of Arundinaria alternate on the axis with the stamens, 
and may therefore be considered the inner whorl or petals. The 
ea are directly opposite the midribs of the carpels and 
indicate that the inner whorl of stamens, present in some bam- 
int ni ened in Arundinaria. Hackel, as is well known, 
€rpreted the lodicules as distichous bracts. 
en oo on the American squaw-root ( Conophols Ameri- 
Sie secs r.) : Dr. Lucy L.W.Witsow, Philadelphia.— An exhaus- 
Made of the vegetative and reproductive parts had been 
host es account of the former only was read. The invariable 
site, and alae oak. The extreme degradation of the para- 
caused the e intimate relation between it and the oak roots 
Phoree and ipa id compare it with members of the Balano- 
the Scrophul e esiacez, rather than with parasitic members of 
attack es ariacee: The seedling parasite seemed early to 
years, until : <5 sates and steadily grew for ten to twelve 
‘his mass i gba mass six inches across might be formed. 
chyma A. chiefly characterized by the abundance of wanind: 
8, developed by the oak host through the irritant 
