TAB. 6579. 
IRIS MISSOURIENSIS. 
Native of California and the Rocky Mountains. 
Nat. Ord. Intpacrex.—Tribe InipEex. 
- Genus Inis, Linn. ; (Baker in Journ. Linn, Soc. vol. xvi. p. 136.) 
Iris (Apogon) missouriensis ; foliis linearibus rigidulis subpedalibus, caulibu . 
2-3-floris fistulosis sursum angulosis, spathe valvis magnis lanceolatis apice 
membranaceis, pedicellis spathz valvis seepissime brevioribus, ovario cylindrico- 
trigono, perianthii tubo brevi infundibulari, segmentis exterioribus oblongis 
unguiculatis reflexis 2-23 poll. longis pallidis lilacino-striatis luteo-carinatis, 
segmentis interioribus erectis lilacinis oblanceolato-unguiculatis exterioribus 
vix brevioribus, styli cristis subquadratis inciso-dentatis, antheris filamentis 
zxquilongis, capsulis oblongo-trigonis apice et basi cuneatis. 
I. missouriensis, Nuttall in Journ. Acad. Philad. vol. vii. p. 58; S. Wats. in 
Bot. Calif. vol. ii. p. 140. 
1. Tolmieana, Herbert in Hook. et Arn. Bot. Beech. p. 395; 8. Wats. in Bot. 
King. Expedit. 342; Baker in Gard. Chron. 1876, p. 226; Journ. Linn. 
Soe. vol. xvi. p. 138. 
This appears to be the commonest Iris of the Rocky 
Mountains. I place the plant we have long known in 
England as Jolmieana as a synonym of Nuttall’s doubtful 
missouriensis, on the authority of Dr. Sereno Watson, who, 
in the recently-published ‘‘ Botany of California,” states its 
distribution as follows :—‘‘ On the eastern side of the 
Sierra Nevada from Inyo to Siskiyou county and the 
Columbia, common in the mountains of the interior east- 
ward to Colorado and Montana, and south to Arizona ; 
apparently the only species of the Great Basin.” Whether 
it be more than a montane variety of the Californian [ris 
longipetala of Herbert (Bot. Mag., Tab. 5298), which is a 
very much finer plant from a cultural point of view, I 
greatly doubt. Although long known, it has never been 
previously figured. Our drawing was made from a plant 
sent at the end of May from Mr. F. Horsman, of the New 
Plant and Bulb Company, Colchester. 
SEPTEMBER Ist, 1881. 
