258 AMMIACEAE. 



27. LEPTOTAENIA Nutt. 



Fruit 8-12 mm. long, usually without oil-tubes ; leaves finely dissected into linear 



divisions. i. L. muUiUda. 



Fruit 15-18 mm. long, with oil-tubes; leaves less dissected into oblong divisions. 



ji. L. Eatoni. 



1. Leptotaenia multifida Nutt. In rich soil from Alb. and Wash, to Colo, 

 and Calif. — Near Dix Post Office; Durango; Glenwood Springs; Baldwin; 

 Spicer. 



2. Leptotaenia Eatoni C. & R. In rich soil from Wyo. and Ida. to Utah 

 and Colo. — Alt. 7000-8000 ft. — Los Pinos; Cerro Summit; Minturn. 



Order 39. ERICALES. 



Gynoecium superior ; fruit usually capsular. 



Herbaceous saprophytes without green leaves. loi. Monotropaceae. 



Herbs or shrubs with green leaves. 



Corolla of essentially distinct petals ; herbs with rootstocks. 



102. Pyeol.'^ceae. 

 Corolla of more or less united petals; shrubs. 103. Ericaceae. 



Gynoecium inferior; fruit baccate or drupaceous. 104. Vacciniaceae. 



Family loi. MONOTROPACEAE Lindl. Indian-pipe Family. 

 I. PTEROSPORA Nutt. Pine Drop, Giant Bird's-nest. 



1. Pterospora andromedea Nutt. In rich woods from Que. and B. C. to 

 Pa., Ariz, and Calif. — Alt. 4000-8000 ft. — Bosworth's ranch, Stove Prairie; 

 mountains, Larimer Co. 



Family 102. PYROLACEAE Agardh. Wintergreen Family. 



Plants leafy-stemmed ; flowers corymbose ; style very short and covered by the 



peltate stigma; filament dilated and hairy at the middle. 1. Chimaphila. 



Plants scapiferous with a basal rosette of leaves ; flowers racemose or solitary ; 



style evident ; filaments subulate, naked. 



Flowers solitary; petals spreading; valves of the capsule not cob-webby on the 



edges. i. MoNESES. 



Flowers racemose ; petals more or less converging, concave ; valves of the 

 capsule cob-webby on the edges when opening. 3. Pyrola. 



I. CHIMAPHILA Pursh. Pipsissewa. 



I. Chimaphila umbellata (L.) Nutt. In woods from N. S. and Alaska 

 to Ga. and Calif. — Alt. 8000-11,000 ft. — Estes Peak, Larimer Co.; North and 

 South Boulder Peak; Bierstadt Lake; Beaver Creek. 



2. MONESES Salisb. One-flowered Wintergreen. 



I. Moneses uniflora (L.)'S. F. Gray. In wet woods from Lab. and Alaska 

 to Pa., Colo, and Ore. — Alt. 9000-12,000 ft. — Silverton ; Marshall Pass ; Front 

 Range, Larimer Co. ; Ruby ; Caribou ; Steamboat Springs ; camp on Little 

 Beaver Creek; Berthoud Pass. 



