1896 | ROSA! AMERICANA 21 
the denticulation of the stipules and bracts* remains constant on 
all the bushes or is exceptional. In the second place, an impor- 
tant point to elucidate is the normal disposition of the prickles. 
Are they normally scattered and only exceptionally paired, or 
are they regularly paired on bushes more or less vigorous ? 
If R. gratissima constitutes a distinct type, it can be expected 
to occur with glabrous leaves and glandular-compound leaflet- 
teeth, and also, perhaps, with pedicels and receptacles hispid- 
glandular. 
Rosa CatiFornica Cham. & Schlecht. 
R. Californica is a species which occurs extensively through- 
out California. It seems to be somewhat common there and 
plays about the same réle as does RX. canina in Europe. It ought, 
therefore, to produce numerous varieties. 
Watson groups R. Californica with R. pisocarpa and R. Fendlert 
in a subdivision characterized by its small flowers, ordinarily in 
pluriferous inflorescences, and its short and narrow stipules; 
while he forms with R. Nutkana another subdivision distinguished 
by its large flowers, ordinarily in one-flowered inflorescences, and 
its dilated stipules. R. Nutkana is well distinguished, indeed, by 
a large corolla, by inflorescences often one-flowered, and by the 
upper stipules remarkably dilated; but in 2. pisocarpa the stip- 
ules cannot be said to be altogether narrow, and the upper ones, 
although smaller than those of R. Nutkana, are, nevertheless, 
more dilated than those of the lower and cauline leaves. The 
same thing is seen in the forms which Watson has described 
under &. Fendleri. In R. Californica all the stipules appear to 
remain narrow, the upper ones becoming no more dilated than 
the lower, as is the case in R. spithamea. This would suggest an 
important distinction to be established between the species with 
upper stipules and bracts dilated, including R. Nutkana, R. piso- 
carpa, R. gratissima, R. Fendleri, R. Woodsii, R. blanda, and R. acic- 
ularis,and those with upper stipules and bracts remaining narrow, 
including R. Californica and R. spithamea. 1 would call the 
™ An analogous denture is observed sometimes in 2. d/anda and R. Arkansana. 
