CURRENT LITERATURE 473 
The statement is made that the division of the nucellus of the mother 
sometimes takes place without the formation of cell walls, but the figures 
are very small and may bear another interpretation. Double fertilization 
was looked for, but nothing definite was found. The development of the 
= and the appearance of tissue systems are described in detail.— 
CHARLES J. CHAMBERLAIN. 
ITEMS OF TAXONOMIC INTEREST are as follows: C. V. Piper (Bull. 
corr. Bot. Club 29 : 221-226. 1902), in his sixth paper entitled “ New and 
teworthy northwestern plants,” describes new species of Antennaria (2), 
dia, Synthyris, Astragalus, and Philadelphus.—J. C. ARTHUR (édem 227- 
31), in his second paper entitled ‘‘ New species of Uredineae,” describes 
‘new _ of Uromyces (2), Puccinia (4), and Uredo (2).— P. A. RYDBERG 
a (3), Lesquerella, Physaria, Cardamine, Sophia (2 2), Draba (7), Ger- 
n (2), Oxalis, and Lupinus (4).—ALICE EasTwooD (Proc. Calif. Acad. 
1 . Bot. 2: 241-252. pls. 27-24. 1902) has published nine new species 
iithes from the Pacific coast, and also a key to the 57 species of that 
—C. D. BEADLE (Biltmore Bot. Studies 1: 51-137. 1902) has pub- 
104 new species of Crataegus from the southern 5 ae: . = 
N (dem 138-142) has published es of 
Coreopsis (2).—T. G, HARBISON (idem 15 158) has published « a new w Tril- 
fom Alabama.—C. D. BEADLE (idem 159-163) has published new 
m species of Philadelphus (3) and Prunus (2).— Dr. WesER (Bull. 
Oc. Nat. d’Acclim. de France, May sey 5 in his second paper ais 
sur les Opuntia,” has diseussed 0. ée a, the “duraznillo” of 
xicans, and also the six presen ‘the section CRINIFERA, one 
O. Gosseliniana) being new.— E. L. GREENE (Ottawa. Nat. 16: 35- 
) ) has described new northwestern species ¢ of Actaea (3), — 
um (3), Carduus, Erigeron (2), Pentstemon, and Lappula.—J. M.C. 
pteridophytes, notably those at the base and apex of the strobili of : 
in which group 94 species were examined. In certain forms | there 
1 a pe » part of the 
ne of demarcation between the strc veg : 
y leaf being a potential sporophyll. The other extreme is to be 
where the strobilus is made up of sporophylls whose form and arrange- 
from the foliage leaves. All degrees of f transitional — aa 
cies quite constantly abortive or imper! gn ee ee 
ex, or in sterile zones of the strobilus. The author discusses these : 
perfect sporangia in certain spice =e vestigial? “Annals sof 
25-267. sie ee ees 
FESSOR F. O. BOWER ™ has called attention to the imperfect sporan- = 
