276 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Glumiflorae. 
Gramineae : Brachypodium distachyon , Coix agrestis , C. lachryma, 
Eleusine corneana, Oryza saliva, Sporobolus airoides , S. 
cryptandrus. 
About 50 species of grasses were examined. Only the seven 
named were assigned to the class in which they are here put; and 
in several of these there was much doubt, and the determination 
was made provisionally. This matter will be further discussed 
below under Gramineae (p.296). 
Spadiciflorae. 
Palmae. Of the palms examined only one had root-hairs. This 
was Oreodoxa regia. On the roots of seedlings a few hairs 
were found. They come from ordinary elongated epidermal 
cells. Gillain has examined the roots of many Palmae. The 
epidermis was one of the parts to which special attention was 
paid. In summarizing the results of this study of thirty-five 
species of palms he says of the epidermis: “ It is retained only 
on the smaller parts of the roots, and then shows elongated 
cells, whose outer membrane is more or less strongly cuticu- 
larized. Only in Trachycarpus excelsus are hair formations 
and papillae present, such as Mohl has reported for Diplothem- 
ium maritimum ” 1 
Cyclanthaceae: Carludovica atrovirens. 
Typhaceae : Sparganium sp., Typha latifolia. 
Araceae: Aglaonema picta, Anthurium Dechardi , A. magnijicum , 
Arisaema triphyllum , Caladium esculentum, Dieffenbachia 
picta, Zantedeschia aethiopica. 
Liliiflorae. 
Liliaceae: Allium narcissiflorum, A. cepa, Anthericum Bernarnii, 
Asparagus plumosus, A. truophinus , Brodiaea congesta, 
% 
1 Gillain, G.: Beitriige zur anatomie der palmen- u. pandanaceen-wurzeln. 
Bot. central!)., 83 : 337 (1900). 
