28 Contributions from the Gray Herbarium 
Pike’s Peak, Aug. 12, 1903, J. C. Blumer; mountains on road from 
Denver to Idaho Springs, ‘Aug. 2, 1872, Porter. 
This species is often common within the limits of its range and 
in spring and early summer when other vegetation is still low, with 
its erect sentinel-like habit, adds a military touch to the otherwise 
seemingly free and open sweep of hill and plain. The nutlets, 
though commonly slightly rugose, are sometimes quite smooth. 
This latter form has been designated forma spicata (Rydb.) Macbr. 
Proc. Am. Acad. li. 546 (1916), i.e. O. spicata Rydb. Bull. Torr. 
Club xxxvi. 678 (1909), and occurs with the typical form. 
. O. SALMONENSIS Nels. & a Bot. Gaz. lxi. 43 (1916). — 
Known only by the type from prairies, in loose soil, Salmon, Lemhi 
Co., Idaho, June, bay Charles L. Kirkley (R. Mt. Herb.). This 
plant seems to be biennial. 
4. O. ELATA Sa. Bull. Torr. Club xxx. 241 (1903). — CoLo- 
RADO: Grand Junction, Mesa Co., May 15, 1892, Alice Eastwood. 
5. O. BaKERI Greene, Pitt. iv. 92 (1899). —_ Sage plains of the 
© Mangos River, Montezuma Co., Colorado. I have not seen this 
species. 
6. O. insolita, spec. nov., biennis radice tenui; caulibus 
mediocriter hispidis 3-4 dm. altis: foliis radicalibus Pisoan tech 33 
cm. longis 5-12 mm. latis strigillosis et paullo adpresse hispidis ; 
foliis sardinia similibus sed gradatim reductis; racemis terminal- 
ibus paniculatis vel inferioribus axillaribus-pedunculatis, remoti- 
floris post anthesin; calyce 5-partito laciniis fructiferis 7-8 mm 
longis dense hispidis, pilis vix fulvescentibus; corolla alba circa 5 
mm. longa, tubo calycem non superante ; nuculis ovatis, acute 
— ee et minute muriculatis, acute cari- 
is. — Nevapa: Los Vegas, May 4, 1905, Gooding, no. 2286 
(Tere, Gray Herb. Toupliecate "R. Mt. He rb.). 
Species of intuinaal aspect, somewhat like that of O. elata but 
with different calyx and pubescence. The nutlets are remarkably 
carinate for the genus. 
O. aperTA Eastw. Bull. Torr. Club xxx. 241 (1903). — Ap- 
parently known only ge Grand Junction, Mesa Co., Colorado. 
I mers yo. din collectio 
FLORA ince Pitt. iii. 111 (1896). O. pe dance 
(Tor), Rydb. “Ball. Torr. Club xxxiii. 150 (1906). Eritrichiwm 
glomeratum (Pursh) DC., var. hispidissimum Torr. Bot - Mex. 
Bound. 140 (1859). — Southern Wyoming to weste rm Texas 
Wyomina: e Hills, Albany Co., July 7, 1804, and "Chg 
lsig June 29, 1900, Aven Nelson, nos. 418 & 7306. Coto 
Callaway Ranch, Larimer Co., es * 1890 (R. Mt. Herb). 
New Mexico: 1847, Fendler, no 
