Pterospora. ERICACEAE. ^61 



scape witli the mostly short raceme 4 to 8 inclies high : bracts small : lobes of the 

 calyx ovate, short, not half the length of the roundish greenish-white petals : cells 

 of the anther contracted into a neck or short tubular prolongation below the orifice. 

 — P. (lentata, Smith, a form with the narrower leaves more or less serrate. Thdaia 

 spatulata, Alefcld, 1. c. 



Open wooda, from tho Mariposa firovo along tlio Sierra, and from Mendocino Co. to British 

 Columbia. Leaves an inch or two Ions, in the nariower forms tapering into the petiole, which is 

 from a (piarter to a full inch in length. Rootstocks erect, branching, rigid. Peculiar to the 

 I'acific side of tho continent. 



4. P. chlorantha, Swartz. Leaves coriaceous, not shining, orbicular or ap])roach- 

 ing it, often retuso, small, commonly much shorter than the petiole : scape and few- 

 flowered raceme 4 to 8 inches high : bracts inconspicuous : lobes of the calyx 

 broadly ovate or roundish, very short, appressed to the base of the oval-obovate 

 white and little-spreading petals : cells of the anther distinctly contracted below the 

 orilice into a short tube. 



Hills near Downievillo, Yuba River, Biqelnui, according to Torrry. Apjmrently rare on tho 

 Pncific sido of tiio coiitin(Mit ; connnon northward on tlin Atlanlic Hido, and aJHo in nortlicrn 

 i'iiu'opc. litmvcs half nil inch (o an inch, Hoinetlincs ovoii an inch and a half long. 



5. P. aphylla, Smith. Scapes leafless, 7 to 12 inches high from a long and 

 deep scaly-bractiMl and doubtless parasitic rootstock : raceme loosely many-flowered : 

 lobes of the calyx ovate, acute, very much shorter than tlie obovate Avhite petals : 

 cells of the anther contracted into a short tube below tlie orilice. — Hook. Fl. ii. 

 48, t. 137. 



Fir woods, along the Sierra Nevada from San Diego Co. to Shasta Co. and to Riitish Colum- 

 bia. Scajic reddish. Flowers about as large as those of P. rotuvdi/olia : sutures of the capsule 

 not cobwebby in dehiscence. A peculiarly interesting plant, on account of its living the parasitic 

 life of the Monotropcce. 



15. ALLOTROPA, Torr. & Gray. 

 Calyx of 5 roundish sepals, persistent. Corolla none. Stamens 10, glabrous : 

 anthers short, 2-lobed, extrorse in the bud, soon becoming introrsely pendulous on 

 tho slender filament ; the cells opening by a chink reaching to near the middle. 

 Ovary globose, C-collod : stylo at first very short, at lengh longer : stigma largo, 

 l)eltnto-cfipiiato. Soods vory nuinnrous on tho thick pliicontio in tho axis, linonr 

 with a small central nucleus. — (Hot. Wilkes Exp. 385, 1874.) Cray in Pacif. 11. 

 Rep. vi. 81, & Proc. Am. Acad. vii. 3G8. — Single ai)ocios. 



1. A. virgata, Torr. & Gray, 1. c. A reddish or whitish herb, a span to a foot 

 high, glabrous, rather fleshy, with a thicker base, beset with ovate-oblong or lanceo- 

 late scales, continued into a virgate many-flowered spike : flowers crowded, very 

 short-pedicelled, 2-bracteolate, a quarter of an inch long ; the upper ones about 

 equalled by the bracts : sepals shorter than tho fdiform filaments, whitish. 



Mendocino Co., near Bear Harbor {Bnlnndcr, Krllngij), generally under Qiicrcus daisijlora ; 

 Sierra Co., Jycmmun. Thence in the Cascade Mountains to Washington Territory. 



16. PTEROSPORA, Nntt. riM:niiors. 

 Calyx deeply .^-parted, short, persistent. Corolla withoring-per-sistcnt, globular- 

 ovate, with contracted mouth ; tho ,5 very .short lobes recurved, almost convolute in 

 tho bud. Stamens 10, included: filaments subulate: anihers short, crert in tho 

 bud (or just before anthesis horiwnital) ; each coll bearing a deflexed awn on tho 

 back near tho base, ojieiiing lengthwise. Style short : stigma r)lobed. Capsule 

 depressed-globular, 5-lobed ; the thin valves persistent by the cohesion of the i)arti- 



