42 Rhodora [FEBRUARY 
allied to broad-petaled species of that region than they are to one 
another. Mr. Burnham was the original collector of Oe. venosa and Oe. 
atrovirens and obtained the seeds through which these species were 
introduced into our experiment gardens. The new seed collections 
are from the same locality as those of 1903. Since Mr. Burnham 
has sent entire inflorescences it seems safe to say, even before the 
seeds are planted, that Oc. Robinsonii is not among the forms which 
he has collected. Nevertheless, there is enough likeness between Oe. 
venosa and Oc. Robinsonii so that a close genetic relationship between 
them seems not unlikely. 
Oenothera cleistantha was collected about ten years ago at Hunting- 
ton, Long Island, by Dr. Geo. Harrison Shull. He has grown it ex- 
tensively for experimental purposes, and the writer has also had it 
under observation during one season. Unlike Oe. Hobinsonit, it has 
no obvious affinity with any Onagra thus far described, either cruciate 
or broad-petaled. In general appearance it is more similar to the Ov. 
venosa of northern New York than to the Oe. stenomeres of Maryland, 
but genetically it is probably not closely related to either. 
Oenothera Robinsonii Bartlett sp. nov. Biennis. Rosula matura 
ca. 50 cm. diametro; foliis maximis 30 X 4 cm., mediocribus 20-25 X 
3.5 cm., viridibus, longe petiolatis, spatulato-lanceolatis, modice 
bullatis, ad basin versus argute dentatis, utrinque exigue pubescenti- 
bus; pilis brevibus appressis. Planta matura ca. 60 em. alta. Caulis 
proprius sursum ramos floriferos deorsum ramos abortivos ferens. 
Rami radicales numerosi (10-20) cauli proprio similes. Caules latere 
insolito rubri, altrorsus maculosi, tuberculato-pilosi, pilis ascendenti- 
bus, tuberculis cauli concoloribus. Folia inferiora caulina eis rosulae 
similia, ca. 13 X 3 cm., media ca. 10 X 2.2 cm.  Bracteae foliaceae, 
persistentes, ovariis longiores sed fructibus maturis plerumque bre- 
viores, anguste lanceolatae, minute puberulae, supra pilis aliis acutis, 
aliis viscidis cylindricis, apice rotundatis, subtus viscidis solis ves- 
titae. Hypanthium gracillimum 33-40 mm. longum, 1.5 mm. cras- 
sum, pilis aliis paucissimis mediocribus ascendentibus, aliis nume- 
rosis brevibus erectis viscidis tectum. Calyx proprius pubescentia 
hypanthio similis, inexpansus gemmam prismaticam quadrangulam 
15 mm. longam 3.5 mm. crassam formans, apicibus liberis 3 mm. 
longis, paulum infraterminalibus, erectis, parallelis, sparsim appresso- 
pubescentibus. Petala margine viridi-flavescentia, medio flava, 
staminibus breviora, 8 mm. longa, 2 mm. lata, supra glabra, subtus 
sparsissime viscido-puberula. Stigma antheris 5-6 mm. longis cir- 
cumdatum. Ovarium 10 mm. longum gracillimum, pilis et longis 
ascendentibus rubro- vel viridi-tuberculatis et brevibus erectis densis 
viscidis tectum. Fructus 26 mm. longi, prope basin 6 mm. crassi, 
