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168 DR. R. R. GATES: A STUDY OF NORTH AMERICAN 
name Owytria. There are only three species, S. eroceum and S. albiflorum 
occupying much the same limited range in the south-eastern States, while 
S. texanum is farther west but overlaps |S. eroceum in Louisiana. The 
differences between these species may be regarded as typical specific 
differences, the three species forming a rather compact group. ©. eroceum 
differs from the other two species in having (1) bright yellow instead of 
white or greenish-white flowers, and (2) obtuse instead of acute or acuminate 
bracts. The other two species are differentiated as follows * :— 
S. texanum. 
Leaves narrowly linear, 1-4 dm. long. 
Scapes as loug as the leaves, simple below 
the inflorescence. 
Pedicels 8-14 mm. long. 
Perianth greenish white, 1 em. broad. 
Segments oblong, obtuse, 3-nerved. 
Seeds 2 mm. long. 
S. albiflorum. 
Leaves narrowly linear, 4-6 dm. long. 
Scapes longer than the leaves, paniculately 
branched above. 
Pedicels 10-25 mm. long. 
Perianth white, 10-12 mm. broad. 
Segments broadly oblong or oval, obtuse, 
mostly 5-nerved., 
Seeds 4 mm. long. 
S. albiflorum is thus a sturdier species with longer branching scapes, 
longer pedicels, somewhat larger flowers, and larger seeds, These differences 
suggest very much the contrasts between GZnothera Lamarckiana and 
CE. gigas, and this is another pair of species which may be suspected 
of tetraploidy or cell-gigantism. It is to be hoped that someone will make 
a cytological study of these three species. 
Anthericum Nuttallianum, Schult., is supposed to differ from S. eroceum 
chiefly in having the basal portion of the raceme interrupted, with the pedicels 
about an inch apart. I have seen specimens having this feature. The form 
should be carefully studied in the field or from a large suite of specimens 
to determine whether it represents a distinct species. Its segregation by 
Schultes is probably to be attributed to the error of Michaux in stating the 
inflorescence of his Phalangium croceum to be pyramidal. 
In his S. Michauwii, Torrey really combined the three species of Schanolirion 
into one. 
19. HASTINGSIA, S. Wats. 
The western genus /astingsia is a segregate from Schenolirion, to which it 
is not, however, closely related. It contains two species as follows :— 
1. Hasriyesta ALBA (Durand), Wats. 
H. alba, S. Wats. in Proc. Amer. Acad. xiv. (1879) 242. 
Schenolirion album, Durand, in Journ. Phila. Acad, ii. 111. (1855) 108. 
N. California and S. Oregon. 
* These characters are taken mostly from Small; Fl, S.E. Un. St. (1903) 268. 
