254 Edward L. Greene: Novitates Boreali-Americanae. V. 
In general mode of growth, in the large size of the panicles, and 
large heads of fruit fruit-made up of numerous and very large achenes, 
this and the last seem near of kin; but the differences between the two 
are also very pronounced. In T. papyraceum there is no bloom at all, or 
any blue-green color, on any part of the plant. Here everything, even 
to the achenes themselves, is pronouncedly glaucescent. Equally unlike 
are the individual achenes in the two, both as to texture, form, and 
veining of pericarps. 
41. Thalictrum propinquum Greene, nov. spec. 
T. occidentali proximum statura multo majus, usque metrale et ultra: 
eaulis sat validus, teres, laetevirens, aSpectu (foliis inter se longe distanti- 
bus) nudiusculus: foliola iis T. occidentalis plus quam duplo majora, 
magis triste viridia, subtus glaucescentia et oculo armato minutissime 
sparsimque glanduloso-puberula: sepala maris longiuscule obovalia, 
obtusa, laete viridia, crebre venulosa, feminei maribus triplo minora, late 
obovalia, obtusissima, laete viridia: antherae breves, longissime sub- 
ulato-apieulatae: achenia 7—8 mm longa, leviter compressa, oblique et 
latiuscule fusiformia, costis ad 10 inaequalibus parum prominentibus 
percursa. 
The habitat of this species is the moi distriets of British 
Columbia. The specimens that are typical for the fruit are from an 
altitude of 5500 feet on Tami Hy Mountain, Chilliwack Valley, and were 
collected by J. M. Macoun, 30 July, 1901. They are on sheet 33606 
of Herb. Canad. Geol. Surv. The flowering specimens are from Emerald 
Lake in the Selkirk Mountains, alt. 4400 feet, E. R. Heacock, 29 June, 
1904. Other specimens probably referable here are from Vancouver 
Island; such as those of John Macoun from near Comox, 1893, and 
from Courtney River the same year. 
Al the specimens I have seen of this type had been labelled as 
T. occidentale, nor is there much doubt that plants like this entered into 
the compositum of Grays original and certainly confused material on 
which he sought to establish a species under that name. But the Oregon 
plants, which he described as showing fusiform achenes fully a half- 
inch long, must rationally be taken as the type of his T. occidentale; and 
the diserepancies between the Oregon plant with the very few long 
slender achenes and this of,the broader, shórter, somewhat flattened 
and even somewhat curved achenes, are so many and so pronounced, as 
to make it clear that in T. propinquum we have a perfectly valid segre- 
gate species. 
48. Thalictrum omissum Greene, nov. spec. 
Caulis 6—9 dm altus, mbdice validus, teres, laevis, aut saturate 
viridis aut obscure purpureo infectus, glaber, glaucescens, ab ima basi 
usque ad inflorescentiam terminalem sparsam foliosus, petiolis omnibus 
brevibus suberectis, Foliorum pars superna fere atrovirens tametsi 
distincte glaucescens: foliola terminalia 3—4 cm longa, supra medium 
aeque lata atque longa, basi aut truncata aut subcordata, usque ad 
