252 _ Edward L. Greene. 
LXV. Novitates Boreali-Americanae. V.') 
. Auctore Edward L. Greene. 
(Originaldiagnosen.) 
Species novae generis Thalictri. 
42. Thalictrum lentiginosum Greene, nov. spec. 
. Planta ut videtur metralis et verosimiliter ultra; caule angulato- 
striato, glabro, glaucescente, purpurascente et maculis albentibus minimis 
‘crebre notato. Folia caulina ampla, petiolata, textura tenuia, utrinque 
viridia, subtus pallidiora; foliola suborbicularia, 3—4 em lata, basi cor- 
data, apice leviter et late 3-loba, lobo mediano vel integro vel breviter 
3-lobo. Panicula fructifera circa 3 dm longa, nuda, densiuscula; fructuum 
capitulis densis, depresso-globosis, circa 1 cm diametientibus, umbellatim 
et subverticillatim in panicula dispositis; carpellà matura late et oblique 
obovata, substipitata, compressa, apice obtusa, venulis (non costis) paucis 
tortuosis plus minus ramosis percursa. 
In shady places at the base of hills toward the seaboard in Los 
Angeles County, California, collected by H. E. Hasse, in fruit 
20 May, 1892; the specimens in U. S. Herb., sheet 210883, labelled by 
the collector as T. polycarpum Watson. That species, however, is of 
northern and middle California, and is marked by very different compact 
foliage, its leaflets being small, acutely lobed and toothed; also its fruit 
is much larger, and formed into larger heads, these quite perfeetly 
spherical, not depressed-globose. 
Both the stems and fruits of the present species are of a purplish 
hue distinctly variegated with whitish dots. 
43. Thalictrum Bernardinum Greene, nov. spec. 
Praecedenti affine at minus; caulis bipedalis altiorve; folia caulina 
subsessilia, utrinque laete viridia, textura firma, foliolorum lobis acutis: 
achenia 4 mm longa, ferme semiorbicularia, apice acuta, compressius- 
cula, venis lateralibus tortuosis ramosisque valde prominentibus. 
Eastern base of the San Bernardino Mountains, southern Cali- 
fornia, collected by S. B. Parish, 29 June, 1894; specimen in U. S. 
Herb. sheet 214571, labelled by Mr. Parish as T. polycarpum Wats. It 
has been the habit of collectors to refer to that species every Californian 
Thalictrum that exhibits the sinuously veined rather than ribbed achene;, 
the truth being that we have, on the Pacific coast of the Continent a 
considerable group of perfectly distinct species, some of them of one 
mountain range, some of the moist seaboard, others of the borders of 
deserts, like this one, which have little else in common except that their 
achenes are not ribbed, but wrinkled-veiny. The next two species are 
of this same group. 
1) Cf. Rep., V (1908), pp. 45—46, 241—244; VII (1909), pp. 1—6. 
d 
