CATALOGUE. 237 



Atriplex* patula, L., var. hastata, Gray, Colorado (262, and 259 

 in part); var. littoralis, Gray, Colorado (259 in part). 



Atriplex expansa, Watson (Proc. Amer. Acad, ix, p. 116). — Annual, 

 erect, much branched ; leaves almost sessile, thin, ovate-triangular, or sub- 

 hastate at base, lower ones opposite; fruiting bracts nearly sessile, broadly 

 cuneate or roundish, distinctly reticulate or muriculate and pale below, 

 herbaceous and irregularly toothed along the free, herbaceous margins, 

 united to above the middle; the interrupted staminate spikes slender and 

 naked above. — A common straggling species growing abundantly on the 

 alkaline flats of the San Luis Valley, Colorado (278). 



Atriplex Wolfii, "Watson, I. c. p. 112. — Annual, low, scurfy -pubes- 

 cent, branching, reddish ; leaves linear, entire, thickish, margins slightly 

 revolute ; "androgynous axillary clusters of flowers very small " ; fruiting 

 bracts §" long and as broad, united to the top ; upper lateral teeth thick, 

 slightly truncate, middle one smaller and somewhat acute; styles short. — San 

 Luis Valley, Colorado (277).— Plate XXIV. Natural size. Fig. 1. Stami- 

 nate flower, about 12-15 diameters. 2. Pistillate flower, about 10 diameters. 

 3. Pistil, about 10 diameters. 4. Section through figure 2. Figs. 5, mature 

 fruit; 6, vertical section of same; 7, annular embryo; all enlarged about 10 

 diameters. 



Atriplex confertifolia, Watson (Obione confertifolia, in King's Re- 

 port, v, 289). — Nevada and Utah. 



Atriplex hymenelytra, Watson (Obione liymenelytra, Torr. in King's 

 Report, v, p. 290).— Nevada. 



Atriplex canescens, James (Obione canescens, Moq.). — This is the 

 982 in vol. v, King's Report, p. 289, but not 981 of same place. It differs 

 from the latter, which is A. Nuttallii, Watson, in having the indurated, 

 fruiting bracts united to the apex, contracted above to a narrow orifice and 

 pedicelled, and not muriculate; the fruiting bracts of A. Nuttallii, Watson, 

 being united to above the middle, the orifice hardly contracted, and the 

 sides usually mui-iculate-toothed, and fruit mostly sessile. See Watson, 

 Revis. Chenopod .1. c. p. 120. — Colorado (268). Specimens from New Mexico, 



* Atriplex. — " Bracts compressed, more or less united : testa double " — Watson, Revision of N. 

 Am. Chenopod. I. c. 



