Novitates Boreali-Americanae. V. ' 253 
44. Thalictrum coreospermum Greene, nov. spec. 
Planta metralis valde foliosa caule foliisque laete virentibus gla- 
berrimis ; folia sat ampla, textura tenuia, caulina petiolata; foliolis mediocri- 
bus, terminalibus aeque latis atque longis usque ad medium trilobis, lobo 
mediano leviter 3-crenata; foliolis lateralibus terminalibus. minoribus, 
plerumque simplieiter et breviter 3-lobis: panicula fructifera pro planta 
paupercula, oligocarpa; achenia pauca, sessilia, latissime gibboso-obovata 
vel interdum suborbicularia, fere 4 mm  diametientia, apice abrupte 
acutiuscula, valde compressa, manifestim subreticulato-venosa: semen 
semiovale, transverse minutim corrugata. 
The only specimen seen of this was obtained in the Cuyamaca 
Mountains, southern California, in July, 1889, by C. R. Orcutt. It 
is a complete specimen, in perfectly mature fruit; and Mr. Orcutt had 
- mistaken it for T. sparsiflorum, of which it has much of the habit, color 
. and texture of foliage, as well as sparse and small panicle;. but its 
almost orbicular achenes, and these merely venulose, demonstrate 
. beyond all controversy its close consanguinity ‚with what is called T. 
polycarpum. 
45. Thalictrum papyraceum Greene, nov. spec. 
Planta ut videtur praealta, verosimiliter bimetralis, undique gla- 
berrima; folia ampla, caulina sessilia; foliola utrinque laete virentia tex- 
tura tenuiter membranacea, plerumque simpliciter 3-loba, lobo mediano 
cuspidato-mucronata, caeteris obtusis: panicula fructifera sat magna, 
laxiuscula; fructuum capitula maxima, 2 cm lata, depresso-globosa; 
achenia 12—18, late cultriformia, 1 cm longa, pericarpio, textura fere 
papyracea, brunneo-nigricante, obscure et irregulariter venuloso: semen 
subteres, oblongum. 
This singularly well marked species, in every way so different from 
the Watsonian T. polycarpum. has nevertheless been distributed under 
that name. Its habitat, the only one known, is a large, island in the 
lower Columbia River in Oregon, called Sauviers Island, where the 
only specimens seen were collected by Joseph Howell, in July, 1877 
The type specimen is on sheet 69209 of the Field Museum Herbarium 
in Chicago. 
46. Thalictrum campylopodum Greene. nov. spec. 
Planta metralis et ultra, undique glabra, glaucescens; folia sat ampla, 
caulina sessilia, textura membranacea; foliola terminalia basi obtusa 
usque ad medium 3-loba sinubus late v-formibus, lobo mediano apice 
8-dentato dentibus subtriangularibus acutis; foliola lateralia minora 
simpliciter 3-dentata; antherae lineares acuminato-apiculatae; panicula 
fructifera magna, subnuda, polycarpa; fructuum capitula magna, depresso- 
globosa, ferme 2 cm lata; achenia 12—18, supra basim angustatam 
stipitiformam recurvam subpyriformia, venis 2- 3 elevatis et plus minus 
tortuosis pereursa: semen oblongum. 
Inhabitant of shaded banks of streams in western Oregon; the 
type specimens, in the herbarium of Mr. John Donnell Smith of Baltimore 
collected by Thomas Howell in 1881. ` 
