REVISION OF THE (2NOTHERZ OF THE SUBSECTION ONAGRA. 475 
The epidermis appears as a seemingly gelatinous transparent coating of the seed. It consists 
of simple, prismatic, 5- or mostly 6-angled, connate cells, each, in the different species examined, 0.06— 
0.10 line in diameter, and 0.3-0.5 line high, near the rhaphe much shorter. The contents of the cells 
are very pale red or colorless, the green or buff color of the seed appertaining to the testa itself. 
In some cultivated varieties these cells may finally become detached, forming a true pulp; but in 
the fruits examined by him such was not the case. If that part of the funiculus which forms the 
rhaphe at last becomes detached from the seed, as has been stated, it must be after a separation of 
these epidermis cells. 
r. Engelmann noticed that the inner coating of the carpellary cavity of R. rubrum consisted 
of a singular deposit of crustaceous and brittle, striated cells or cell-walls, which he had not observed 
in any other species examined by him. —Journal of Proceedings, June 2, 1862. 
IV. REVISION OF THE CNOTHERZ OF THE SUBSECTION ONAGRA. 
From Gray’s ENUMERATION OF PLanTs oF Dr. Parry’s CoLLECTION IN THE Rocky Movuntarns, SUPPLEMENT 2 
(Amer. JourRN, Sci. AND Arts, Second SgriEs, Vou. XXXIV. Nov. 1862). 
A large suite of specimens enables me to clear up some difficulties which have environed the following [333] 
species of Hnothera. 
- CENOTHERA CORONOPIFOLIA, Torr. & Gr. Fl. 1, p. 245; Gray, Pl. Fendl. p. 43: perennis, sepe multicaulis, 
‘ecsiilts erecta seu erecto-patula, puberulo-canescens, strigosa seu hispida; foliis infimis lineari-spathulatis, ceteris 
pec tinato-pinnatifidis ; ; tubo calycis ad faucem dense villoso ; petalis suborbiculatis integris stamina equantibus pistillo 
Fendler (No, 222) near Santa Fé, along water-ducts, and by Dr. Hayden on the sandhills of the Loupfork, on “ Running 
Water.” Stems }-1 foot high: flower white, turning deep red, about an inch in diameter: capsule in Fendler’s 
specimens about an inch long, in Hayden’s only about 4 lines long, thicker than in the allied species : seeds yellowish- 
brown, about a line long, thick, beset with tubercles arranged in longitudinal rows. 
2. CENOTHERA PINNATIFIDA, Nutt., Gen. 1, p. 245; Torr. & Gr. Fl. 1, p. 494. C. albicaulis, Pursh, Fl. 2, p. 
733: DC. Prodr. 3, p. 51, non Nutt. (@. Purshiit, Don. Syst. 2, p. 688. CE. Purshiana, Steud. Nom. 2, p. 207 
annua seu biennis, humilis, diffusa (rarissime erecta), puberula, rarius sursum hirsuta; foliis imis obovato-spatulatis 
acutis seu obtusis integris, ceteris pinnatifidis sepe ciliatis; tubo calycis ad faucem nudo; petalis late obcordatis seu 
oo marginatis genitalia superantibus ; capsula lanceolato-lineari torulosa sessili suberecta ; seminibus ovatis tur- 
gidis utrumque apiculatis foveolatis seriatim inter costas dispositis eleganter notatis. Sandy soil on White River, Upper 
Missouri, Nuttall, Geyer in Nicolle’'s Expedition, Dr. Hayden; Las Vegas and Santa Fé, New Mexico, Dr. Wislizenus, 
Mr. Fendler ; the latter’s specimens, few in number, bearing his private number 239, were distributed with 
others of the next species under No. 223; Southern New Mexico, Wright (referred to @. coronopifolia in Pl. [334] 
Wright. 1, p. 69.) All the specimens I have seen are either annual (sometimes simple and one-flowered) or, 
usually, biennial, with rosulate entire radical leaves ; branching from the base, diffuse or even decumbent ; an erect 
form was collected by A. Gordon on the Upper Canadian River, No. 29, similar to the last species in habit. Stems 
usually 4-6 inches high, but, according to Nuttall, the decumbent branches sometimes 2 feet long. Flowers 2}-3 
inches in diameter, white, turning pale red: capsule 1-1} inches long: seeds very regularly and prettily pitted 
between the longitudinal ribs, 0.6-0.7 of a line long, yellow. Don and Steudel have changed Nuttall’s earlier name, 
but his must stand, and Humboldt’s plant, described five years later under the same name, may receive the name of 
. Humboldtit. 
3. CENOTHERA = Nuttall in Fras. Cat., 1818, & Gen. 1, p. 245; Torr. & Gr. Fl.1, 495; Gray, P. 
Wright. 1, p. 69, & 2, p. 56: perennis, glabra, puberula seu hirsuta; caulis cortice albida membranaceo nitente ; Aris 
maxime variis; petalis Sail wom in unguem plus minus attenuatis integris stamina superantibus pistillum 
eequantibus ; capsula e basi crassiore sessili lineari divaricata sepe flexuosa seu deflexa; seminibus minoribus lineart- 
la is levibus. A common plant on the western plains, extending into Oregon, New Mexico, and Chihuahua, as 
variable in habit, growth, and foliage as it is common, but always easily recognized by the unvarying characters of the 
