210 Rhodora [OCTOBER 
The name Oenothera Tracyi is proposed for a southern plant which 
has appeared in cultures of Oe. grandiflora from wild seed collected 
in 1907 by Prof. S. M. Tracy at Dixie Landing, near Tensaw, Alabama. 
Several plants grew from the wild seed in the garden at Bethesda, Md., 
in 1910, from one of which a second generation is now under observa- 
tion. An identical strain also originated from part of the same lot 
of seed grown by Dr. B. M. Davis at the Harvard Botanic Garden 
in 1910, from which a second generation has been grown from self- 
pollinated seed both at Bethesda and Cambridge in 1911. 
Type specimens of the species will be prepared from an individual 
of the latter strain growing at Bethesda under the collection number 
2749. The seed was received from Dr. Davis under the designa- 
tion “strain S.” Photographs by Dr. Davis, from which the illustra- 
tions accompanying this article have been prepared, represent plants 
of the same strain, grown at Cambridge. A description of Oe. Tracyi 
is presented at this time at the request of Dr. Davis, who is preparing 
a report upon the behavior of certain of its hybrids with Oe. grandi- 
flora. The species is named for Prof. S. M. Tracy, to whom students 
of the evening-primroses are so greatly indebted for the rediscovery 
of Bartram’s locality for Oe. grandiflora. 
Oenothera Tracyi, sp. nov. Annua. Rosula cito evanescens, pauci- 
folia, foliis spatulatis vel oblanceolatis, maximis ca. 9 cm. longis, 
2.5 cm. latis, rubromaculatis, apice obtusiusculis, margine sinuatis. 
Planta matura 1.5-2.0 m. alta, deorsum ramos cauli primario fere 
aequilongos, sursum usque ad inflorescentiae basin ramos brevis 
rosulatos ferens. Caules viridis vel roseo-tincti, pilis aliis sparsis 
patentibus basi rubrotuberculatis aliis densis minutissimis crispis 
albis vestiti. Folia approximata vix sessilia, remote denticulata, 
atroviridia, utrinque molliter pubescentia, apice basique acuta, 
inferiora oblanceolata, ca. 17.5 cm. longa, 3.7 cm. lata, superiora 
lanceolata. Inflorescentia ex spicis pluribus densis composita, 
ramulis rubris. Bracteae infimae textura formaque foliis superiori- 
bus simillimae, prope basin latissimae, apicem versus angustatae, 
supremae angustae fere subulatae, omnes divergentes ciliatae, semper 
ovario longiores, plerumque fructu breviores. Flores suaveolentes. 
Hypanthium pallido-viride ca. 34 mm. longum, pilis aliis sparsis 
curvatis vel subappressis acutis, aliis brevioribus numerosis erectis 
apice rotundis viscidulis tectum. Calycis segmenta nondum expli- 
cata gemmam conicam diametro ad basin 4.5 mm. sub apice 4.0 mm. 
formantia, 15-22 mm. longa hypanthio sparsius puberula, apicibus 
liberis 2-3 mm. longis terminalibus inter se appressis, dense pilis 
acutis crispis pubescentibus. Corolla petalis prima vespera flavis, 
