Pterospora. ERICACEiE. 461 



scape with the mostly short raceme 4 to 8 inches 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. dentata, Smith, a form with the narrower leaves more or less serrate. Tkdaia 

 spatulata, Alefeld, 1. c. 



Open woods, from the Mariposa Grove along the Sierra, anil from Mendocino Co. to British 

 ' lolumbia. Leaves an inch or two long, in the narrower forms tapering into the petiole, which is 

 from a quarter to a full inch in length. Eootstocks erect, branching, rigid. Peculiar to the 

 Pacific side of the continent. 



4. P. chlorantha, Swartz. Leaves coriaceous, not shining, orbicular or approach- 

 ing it, often retuse, 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 

 orifice into a short tube. 



Hills near Downieville, Yuba River, Bigelow, according to Torrey. Apparently rare on the 

 Pacific side of the continent ; common northward on the Atlantic side, and aUo in northern 

 Europe. Leaves half an inch to an inch, sometimes even an inch and a half long. 



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

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

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

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

 48, t. 137. 



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

 bia. Scape reddish. Flowers about as large as those of P. rotimdifolia : sutures of the capsule 

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

 life of the Moiiolropccc. 



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 

 (lie slender filament ; the cells opening by a chink teaching to near the middle. 

 Ovary globose, 5-celled : style at first very short, at lengh longer: stigma large, 

 peltate-capitate. Seeds very numerous on the thick placentae in the axis, linear 

 •with a small central nucleus. — (Dot. Wilkes Exp. 385, 1874.) Gray in Pacif. K. 

 Rep. vi. 81, & Proc. Am. Acad. vii. 368. — Single species. 



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 virgato 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 the filiform filaments, whitish. 



Mendocino Co., near Bear Harbor {Bolamder, Kellogg), generally under Qucrcus densiflora; 

 Sierra Co., Lcmmun. Thence in the ( lascade Mountains to Washington Territory. 



16. PTEROSPORA, Nail. Pixkdrops. 



Calyx deeply 5-parted, short, persistent. Corolla withering-persistent, globular- 

 ovate, with contracted mouth ; the ~> very short lobes recurved, almost convolute in 

 He- hud. Stamens In, included: filaments subulate: anthers short, ereel in the 

 bud (or just before anthesis horizontal); each cell bearing a deflexed awn on the 

 hack near the base, opening lengthwise. Style short : stigma 5-lobed. Capsule 

 depressed-globular, 5-lobed ; the thin valves persistent by (he coheai t' the parti- 



