ADDITIONS AND CORRECTIONS TO VOL. I. 453 



nearly half the length of the clavate tube : stigma bi-apiculate : follicles 2 or 3 inches 

 long, irregularly moniliforin, 1 - 4-seeded, at length breaking into 1-seeded joints : 

 seed 5 lines long. Proc. Amer. Acad. xii. 64, and 1. c. 



Mohave Desert (Palmer, n. 435) ; Northern Arizona and Southern Utah, Mrs. A. P. Thompson, 

 Palmer, Parry. 



Page 475. 1. ASCLEPIAS. 



3. A. Mexicana, Cav. Substitute for A. fascicularis, Decaisne, which is 

 identified with the Mexican species by Dr. Gray. Icon. i. 42, t. 58 ; Gray, 1. c. 96. 



7. A. erosa, Torr. (Substitute for A. leucophylla, Engelm.) Founded upon 

 a glabrate state, as Engelmann's upon the canescent-woolly form. 



Var. obtusa, Gray, 1. c. A form with elliptical and very obtuse leaves and scanty 

 woolliness. A. leucophylla, Engelm., var. obtusa, Gray, Bot. Calif, i. 620. 

 Bartlett's Canon, near Santa Barbara, Rothrock. 



8. A. Fremonti, Torr. Canescently tomentose, with short fine wool, or the 

 stem puberulent, a foot high or less : leaves oblong or ovate-oblong, subcordate at 

 base, obtuse or acute, entire, distinctly petioled, 3 or 4 inches long : umbels 1 to 3, 

 on peduncles not longer than the woolly pedicels : corolla whitish, the oblong-ovate 

 lobes 3 lines long : hoods nearly erect, equalling the anthers, somewhat evenly trun- 

 cate, the inner angles produced into a tooth ; horn broad, the subulate exserted apex 

 incurved. Gray, Syn. Fl. ii. 93. 



On the Upper Sacramento (Fremont, Newberry) ; near Chico (Mrs. J. Bidwell, Hooker & Gray) ; 

 near Little Lake, Mendocino County, Rattan. 



K- -i- *- Hood mainly solid, laterally compressed with narrow dorsal keel and 

 broader ventral wing ; the latter bearing two semi-obovate lamellce enclosing a 

 broad crest ivhich is produced into a short subulate exserted horn. 



9. A. nyctaginifolia, Gray. Roughish-puberulent, ascending, apparently a foot 

 high : leaves rhombic-ovate, 2 or 3 inches long, rather long-petioled : umbels lateral, 

 very shortly peduncled, 4 - 8-flowered ; pedicels equalling the peduncle : corolla 

 greenish, the oblong lobes 6 lines long : column very short : hoods little shorter than 

 the petals, nearly twice longer than the anthers ; exserted horn a line long. Proc. 

 Amer. Acad, xii. 70, and Syn. Fl. ii. 95. 



At Rock Spring, Providence Mountains, Palmer. 



Page 477. 2 a . SCHIZONOTUS, Gray. 



Hoods saccate, oval, cleft on the back from apex to base, the ventral side adnate 

 the whole length to the column. Anthers, etc., of Acerates. Leaves opposite. 

 Gray, Proc. Amer. Acad. xii. 66, and Syn. Fl. ii. 86, 100. 



A single species, separated from Gomphocarpus and from Acerates by the strictly dorsal fissure 

 of the hood. 



1 . S. purpurascens, Gray, 1. c. Gomphocarpus purpurascens, Gray, Proc. 

 Amer. Acad. x. 76, and Eot. Calif, i. 477. 



3. PHILIBERTIA, HBK. 



Calyx minutely 5-glandular within. Corolla open-campanulate or (in our species) 

 rotate and deeply 5-cleft or -parted ; lobes commonly ciliate, narrowly overlapping. 

 Crown double, the outer a membranous ring adnate to the base of the corolla, the 

 inner of 5 fleshy or hood-like scales adnate to the base of the stamineal column. 

 Stigma flat or umbonate or with a short 2-cleft beak. Follicles rather thick, smooth, 

 acuminate. Perennial herbaceous or shrubby twining plants, with opposite petio- 



