WOOTON AND STANDLEY FLORA OF NEW MEXICO. 467 



1. Meriolix serrulata (Nutt.) Walp. Repert. Bot. 2: 79. 1843. 



Oenothera serrulata Nutt. Gen. PI. 1: 246. 1818. 



Type locality: "From the river Platte to the mountains, on dry hills." 



Range: Manitoba and Minnesota to New Mexico and Texas. 



New Mexico: Nara Visa; Knowles; Lakewood; Redlands. Dry plains, in the 

 Upper Sonoran Zone. 



10. ANOGRA Spach. 



Spreading biennials or perennials, 30 to 40 cm. high or less, somewhat woody at the 

 base, with simple, more or less sinuate-toothed leaves and showy white flowers opening 

 in the evening and at night, turning rose pink the second day; cortex often papery 

 and exfoliating, the stems often white and shining; buds drooping; ovules numerous, 

 in a single row in the cell; capsules sessile, sometimes enlarged at the base, often 

 woody, 4-celled, the seeds terete. 



key to the species. 



Tips of the calyx segments not free in bud, the buds merely 



acute ] . A. albicauUs. 



Tips of the calyx segments free, the buds abruptly acuminate. 



Throat of the calyx villous within 2. A. coronopi/olia. 



Throat of the calyx not villous. 



Plants glabrous throughout 3. A. pallida. 



Plants not glabrous. 



Calyx appressed-pubescent, not at all hirsute. 



Plants grayish; leaves densely appressed- 

 pubescent, slightly pinnatifid or entire. 4. A. gypsophila. 

 Plants green; leaves sparingly pubescent, deep- 

 ly pinnatifid 5. A. runcinata. 



• Calyx more or less villous or hirsute. 



Calyx merely villous, without appressed pubes- 

 cence. 

 All leaves petioled, nearly glabrous; cap- 

 sules 20 to 25 mm. long; petals 18 to 



20 mm. long 10. A. neomexicana. 



Upper leaves clasping, abundantly pubes- 

 cent; capsules 35 mm. long or more; 



petals about 15 mm. long 11. A. amplexicaulis. 



Calyx with appressed pubescence as well as 

 spreading hairs. 

 Whole plant densely villous or hii-sute. 



Leaves nearly entire, sessile 8. A. engelmanni. 



Leaves deeply pinnatifid, petioled 9. A. leucotricha. 



Plants with only a few spreading hairs, most 

 of the pubescence appressed. 

 Leaves with only a few shallow teeth, 



not hirsute 6. A. latifolia. 



Leaves deeply pinnatifid, more or less 



hirsute 7. A. ctenophylla. 



1. Anogra albicaulis (Pursh) Britton, Mem. Torrey Club 5: 234. 1894. 

 Oenothera albicaulis Pursh, Fl. Amer. Sept. 733. 1814. 

 Oenothera pinnatijida Nutt. Gen. PI. 1: 245. 1818. 

 Type locality: "In Upper Louisiana." 

 Range : Montana and North Dakota to Mexico and Texas. 



