ALLOTROPA MONOTROPACEAE 427 



PTEROSPORA 



filaments by the back or base, opening by longitudinal slits : pollen 

 grains simple. Style short or elongated : stigma capitate or peltate. 

 Ovary superior, 4-6-lobed, 1-6-celled; with the placentte project- 

 ing from a central columella, or parietal and 2-lamellate: ovules 

 numerous, anatropous. Fruit a loculicidally 4-6-valved many- 

 seeded capsule. Seeds minute, the testa reticulated. 



Tribe i. Ovary 4-5-celled, with the placentae on a thick cen- 

 tral columella. 



1 Allotropa Calyx of 5 roundish marcescent sepals, corolla wanting. 



2 Pterospora Calyx deeply 5-parted : corolla globular-urceolate. 



3 Sarcodes Calyx of 5 erect persistent sepals : corolla cylindraceous- 

 campanulate. 



4 Monotropa Calyx of 2-4 deciduous sepals : petals 5-6, not saccate at 

 base, tardily deciduous. 



5 Hypopitys Sepals 3-5, commonly as many as petals : petals saccate 

 at base. 



Tribe ii. Ovary 1-celled or spuriously 4-5-celled; the 4 or 5 

 placentas parietal and 2-lamellate. 



6 Pleuricospora Calyx complete, of 4 or 5 scale-like fimbriate-lacini- 

 ate sepals : corolla of 4 or 5 plain petals : ovary strictly 1-celled. 



7 Newberrya Calyx incomplete, of 3 bract-like entire sepals : corolla 

 tubular-urceolate 4-5-lobed, marcescent : ovary spuriously 5-celled. 



Tribe I Eumonotropeae Gray Syn. Fl. ii, 18. Ovary 5-celled, 

 or sometimes 4-cc!led, the placentae projecting from a thick cen- 

 tral columella. 



1 ALLOTROPA T. & G. Bot. Wilkes 385. 



Scapose red or whitish scaly-bracted herbs with numerous 

 small flowers in a virgate spike. Calyx of 5 rounded sepals, mar- 

 cescent under the capsule. Corolla none. Stamens 10: anthers 

 didymous on long and slender filaments, extrorse in the bud, be- 

 coming introrsely pendulous ;' cells opening by a chink from the 

 apparent apex to the middle. Style short ; stigma peltate-capitate. 

 Capsule globose, very many-seeded. Seeds minute, scobiform, the 

 loose coat produced at both ends. A single known species. 



A. virgata T. & G. 1. c. Stems several from a deep-seated perennial 

 rootstock, 6-13 inches high or more, deep red or yellowish, thick and 

 densely scaly at base, more sparingly scaly above; lower scales ovate, 

 acuminate, the upper lanceolate, passing into the linear bracts of the vir- 

 gate many-flowered spike : pedicels erect or spreading, 2-bracteolate : 

 calyx erosely dentate, shorter than the filaments. On dry wooded ridges 

 of the Cascade Mountains, Washington to California. 



3 PTEROSPORA Nutt. Gen. i, 269. 



Tall scapose scaly-bracted plants with red or yellowish flowers 

 in a long raceme. Calyx deeply 5-parted, persistent. Corolla 

 gamopetalous, globular-urceolate, with 5 short recurved lobes, 

 persistent. Stamens 10, not exserted : filaments subulate-filiform : 

 anthers ovate-didymous, introrse, erect or in the bud horizontal- 



