364 AN ACCOUNT OF THE GENUS AKGEMONE. 



(1858) ; Porter, Flor. Colorad. 6 (1874) ; Britt. Bull. Torrey Bot. 

 CI. ix. 156 (1882); Kerber, Sitzungsber. Bot. Ver. Brand, xxiv. 35 

 (1882) ; Coulter, Contrib. U. S. Nat. Herbm. ii. 12, quoad plantain 

 albifloram (1891), nee Linn. A. viexicana var. albijiorn Torrey, 

 Ann. Lye. N. Y. ii. 166 (1828); Eaton & Wright, N. Amer. Bot. 

 134 (1840); Torrey in Frem. Rep. 87 (1845), et Marcy, Rep. 280 

 (1853); Torrey & Gray, Pac. R. Rep. ii. 125 (1854); Torrey, Vac. 

 R. Rep. iv. 64 (1856) ; Gray, Pac. R. Rep. xii. 40 (1860) ; Kuntze, 

 Rev. i. 13, syn. A. hispida exclus. (1891), nee DC. A. Barclaiana 

 Loud. Hort. Brit. ed. 2, Suppl. 472 (1850), nee A. Bardayana 

 Penny. A. hispida Gray & Hook. Vey. Rocky Mts. 26 ; Hook. f. 

 But. Mag. t. 6402 (1878), vix A. Gray." A. platyceras \sir., S. "Wats. 

 Proc. Am. Acad, xviii. 318 (1882). A. platyceras Oyster, Bull. 

 Torrey Bot. CI. xiv. 233 (1887), et xv. 214 (1888) ; Webber, Amer. 

 Natur. xxiii. 633 (1889); Wats. & Coult. in Gray, Manual, ed. 6 

 59 (1890) ; Eydberg, Amer. Natur. xxv. 486 (1891). A. albiflora 

 S. Wats. Proc. Amer. Acad. xxiv. 38 (1889), nee Horn em. A. 

 platyceras var. rosea Coult. Contrib. U. S. Herb. i. 30, quoad Palmer 

 n. 20 tantum (1891). 



America : Nebraska ; ad fl. Platte, Cooke in Herb. Carey ! Jones, 

 n. 218! Kansas, ad fl. Purgatoire, Bell, n. 144! Texas, Wallace 

 in Herb. Durand ! Reverchon, n. 24 ! Nova Mexico ; Organ Mts., 

 Vasey, n. 12\ Mexico borealis ; ad. fl. Eio Grande, Schott (Mex. 

 Bound. Comm.), n. 23! inter Lareda et Bejar, Berlandierl Parras, 

 Palmer, n. 20 (spp. floribus roseo suffusis) ! California inferiore ; 

 apud Muleje, Palmer, n. 7 (spp. parvijiora) I 



Var. stenopetala : floribus parvis subsessilibus, petalis anguste 

 lanceolatis acutis, sepalorum cornubus angustatis teretiformibus. 

 Argemone platyceras Pringle, PI. Mex. exs. n. 43 (1885), haud- 

 quaquam Link & Otto. 



America : Mexico ; Cbilhuahua, Pringle, n. 43 ! (v. etiam sp. in 

 Hort. Cosson cult.). 



Herbaeea gracilis, annua vel biennis, 30-90 cm. alta, ramis 

 floriferis in var. typica 4-10 cm. longis, in var. stenopetala brevis- 

 simis ; foliis 8-20 cm. longis, 2-0-4 cm. latis; sepalis 2-5 em. 

 longis, cornubus 6-8 mm. longis; alabastris 1 cm. latis, floribus in 

 var. typica 6-8 cm., in var. stenopetala 2-5 em. tantum latis; eap- 

 sula 3-3 '5 cm. longa, 1-5-2 cm. lata, stylo 2-4 mm. longo, 

 seminibus 2 mm. latis. 



This is, witliout doubt, the most troublesome of the white- 

 flowered forms of Argemone to localise. As its bibliography shows, 

 American botanists have usually placed it, when it comes from 

 Texas or Mexico, in A. mexicana, but have been fairly evenly 

 divided in their opinions, when they have received it from the 

 prairies, as to whether it should be associated with A. alba or with 

 A. platyceras. It does not, however, admit readily of association 

 with either of these species, unless — and there is much to be said 

 in favour of the view — it is looked upon as only a variety of a 

 comprehensive white-flowered species that shall include A. alba and 

 A. platyceras alike. The settlement of this question must be left to 

 botanists in America, who have ample opportunities of deciding the 



