92 BOTANICAL GAZETTE. [ April, 
genus, _— 57 capgbes that he pant strictly preserve the old specific names 
in his genera; and when he s wantonly and knowingly neglected this 
rule, it 1 eee ee att to correct an ut when a ‘botanist has established what 
he believes to ig a new species, and has therefore given it a new name, the 
changing this name after it has got into sane. ciroulat tion, because it has 
een discovered that some other botanist had previously published it * a 
wrong Loses is only adding a synonym without any y adyiies e whatever, 
ing an old for t ific adjecti 
ms ; t perceivi 
between ma kin ng aay chaueiae 6 name that the practice objected to has bee 
adawted by some of the first among recent botanists, suck as Weddell, t “teehee 
under protest, 
Thalictrum.—It is desirable that attention be given to our polygamo-dic- 
cious species of this genus, namely, T. pu rpurascens and T. Cornuti of the Man- 
herbaria, together with the numerous specimens in the dupli icate collection of 
the late Charles i in the hands of Dr. Goodale—I should charac- 
terize these species as follows 
T. PURPURASCENS Linn. ar stout and tall, green or mostly ig — 
leaves parle. 3-4- pec the lowest petioled: leaflets as much a ong, 
short-stalked, firm, the upper surface dark-green, mostly oblong o pe nae 
neate with three abbe: pointed lobes above : flowers nearly dicecious ies rarely 
with a few stamens when fertile), purplish, in a loose leafy panicle: stamens 
numerous, their long and spreading filaments widening to the linear- rapes: 
cuspidate anthers, which are 2-3 mm. long: achenia densely clustered, 3 
long, ovoid-acuminate with mostly eight sharp longitudinal wings, those at 0 
sutures most prominent, thin-walled, tapering into the slender persistent style. 
—Canada to Florida and Texas; west to Arizona, Montana and Saskatchewan. 
Varies from glabrous or granular to pubescent or glandular-pubescent on 
the lower surface of the leaves, etc. When conspicuously glandular-pubescent 
it is T. graveolens Muhl., in Fl. Lancast. Mss., which is the variety ceriferum 
Austin, of the Manual. Veiny and with strongly sacobabe margins it is 7. revo- 
DC.; with pubescent achenia it is T. dasycarpum Fisch. Mey. & Lall., 
which commonly approaches the next species in having — scarcely 2mm. 
long and SS filaments ecaunnmiats equalling the anthers in 
width and involute when dry. A form with thin leaves ‘aia thicker than 
in dioicum) and very long slender stigmas is J. macrostiyma Torrey ined., from 
— ( Hale) and Indian Territory (Palmer); which appears to be partly 
ted with the type by shorter-stvled Arizona specimens collected by Rusby. 
ie POLYGAMUM Muhl. (T. Cornwi of the Manual).—Of the general ap- 
pearance of the last bat often less purple and with smaller leaves and leaflets: 
flowers most common ly polygamo-dioecious, more corymbosely clustered at the 
