AMMIACEAE. 253 



3. Aletes humilis C. & R. In the mountains of Colo. Dale Creek, Larimer 

 Co. 



10. BERULA Hoffm. CUT-LEAVED WATER PARSNIP. 



i. Berula erecta (Huds.) Coville. (B. angustifolia Koch) In water from 

 Ills., Minn, and B. C. to Tex. and Calif. Alt. 4000-6000 ft. Ft. Collins; 

 Poudre flats; Boulder. 



ii. LIGUSTICUM L. LOVAGE, ANGELICA. 



Leaves twice or thrice compound ; first divisions ternate. 

 Stem leafy ; divisions of the leaves not filiform. 



Leaves thin, dark green. i. L. Porteri. 

 Leaves thicker, pale green. 2. L. affine. 

 Plant subscapose or with a single leaf ; ultimate divisions of the leaves linear- 

 filiform. 3. L. tenuifolium. 

 Leaves once pinnate ; plant scapose. 4. L. Eastwoodii. 



1. Ligusticum Porteri C. & R. In mountain woods from Wyo. to N. M. 

 and Ariz. Alt. 8000-12,000 ft. Lake City ; near La Plata Post Office ; Engel- 

 mann Canon; Georgetown; headwaters of Pass Creek; headwaters of Sangre 

 de Cristo Creek ; Turkey Creek and tributaries ; Veta Mountain ; Mirror Lake ; 

 near Pagosa Peak; Columbine; Cerro Summit; Crested Butte; mountains 

 west of Steamboat Springs ; mountains between Sunshine and Ward. 



2. Ligusticum affine A. Nels. Open, moist hillsides in Wyo. and Colo. 

 Summit of North Park Range, Larimer Co. 



3. Ligusticum tenuifolium S. Wats. In mountain woods from Ida. and Ore. 

 to Colo. Middle Park; South Park. 



4. Ligusticum Eastwoodii C. & R. In the mountains of Colo, and S. 

 Wyo. Alt. 10,000-11,000 ft. Mountains above Ouray; Bear Creek Divide; 

 Pagosa Peak; Keblar Pass; La Plata Mountains. 



12. MUSENION Raf. 



Fruit glabrous or slightly puberulent. i. M. divaricatum. 



Fruit strongly scabrous puberulent. 2. M. angustifolium. 



1. Musenion divaricatum (Pursh) C. & R. In dry ground from Ass. and 

 Alb. to S. D. and Colo. Alt. 4000-6000 ft. North Denver; outside of Dixon 

 Canon; north of La Porte; foot-hills, Larimer Co.; Spring Canon; west 

 of Loveland ; Boulder. 



2. Musenion angustifolium Nutt. In arid valleys in hard ground of Ass. 

 and Alb. to Colo. Alt. 4000-5000 ft. Plains near Denver. 



13. AULOSPERMUM C. & R. 



Clusters of leaves and peduncles borne at the summit of a more or less elongated 



stem. 

 Corolla yellow. 



Rachis of the primary leaf-segments dilated ; secondary segments confluent, 



broad, toothed or merely cleft. i. A. longipes. 



Rachis of the primary leaf-segments not dilated ; secondary segments distinct, 

 finely dissected into small oblong lobes. 2. A. angustum. 



Corolla purple. 3. A. planosum. 



Leaves clustered at the base; plant acaulescent. 4. A.purpureum. 



