634 TRIDACEZ IRIS 
I, bracteata Watson Proc. Am. Acad. xx, 375. Stems rather stout, 
6-12 inches high, covered with imbricated sheathing bracts 2-4 inches long: 
leaves solitary, evergreen, rigid 1-2 feet long, 6-8 lines wide, or sometimes 
much smaller, striate, one side green, the other glaucous with numerous 
stomata:bracts of the spathe approximate: 2-3 inches long, short-acuminate 
usually 2-floweréd: perianth yellow, witha short funnelform tube: outer 
segments oblong, naked, 2-3 inches long, the inner ones oblanceolate, some- 
what shorter: capsule ontexserted pedicels, ovate-oblong, an inch long. In 
open forests, about Waldo, southern Oregon. 
I. Douglasiana Herbert, H. & A. Bot Beech. 395. Stems stout, 6-18 
inches high: leaves linear, 12-30 inches long, 4-8 lines broad, thick and rather 
rigid; long acuminate, finely striate: bracts of the spathe lanceolate, 3-4 lines 
long, acuminate flowers several, somewhat panicled, on pedicels 6-18 lines 
long: perianth b!ue or purplish, the outer segments with a white centre veined 
with purple, its tube narrow, 6-12 lines long: capsule oblong, acutely triang- 
ular, 18-20 lines long: seeds nearly globular. Along the coast, southern 
Oregon to California. 
* * Tube of the perianth short and funnelform above the ovary, 
Rootstock slender: stems leafy: leaves not evergreen: bracts folia- 
ceous, separate and often distant. 
1. tenuis Watson Proc, Am. Acad. xvii, 380. Rootstock very slender 
and creeping: stems 8-10 inches high, with 2 or 3 bract-like leaves 2-5 inches 
long, 2-flowered: the longer leaves of the sterile branches of the rootstock 
equalling the stem and 4-6 lines broad, acuminate and very acute: bracts 
contiguous or distant, 1-2 inches long, flowers white, lightly blotched and 
striped with pale yellow and purple: perianth tube 2-3 lines long, the seg- 
ments naked, the vuter 15 lines long, a little exceeding the emarginate inner 
ones: capsule depressed-globose, 6 lines in diameter, on pedicels as long or 
longer than the bracts. In the Cascade Mountains along the Clackamas river 
and its tributaries in Oregon. 
I. tenax Dougl. Bot. Reg. t. 1218. Rootstock slender, usually short 
and forming dense tufts 6-18 inches in diameter: stems slender 6-12 inches 
high, bearing several sheath-like short leaves anda single purple flower: 
leaves very numerous, 12-20 inches long, much longer than the stems, about 
2 lines broad acuminate and mostly very acute: bracts lanceolate, acute: 12 
inches long: tube of the perianth very short, its outer segments 2 inches long 
or more, with oblong blade and broad claw, the inner ones spatulate and 
nearly as long: capsule oblong, 8-12 lines long, obtuse at both ends: seeds 
scarcely flattened, somewhat angled obtusely, Common in open places, Brit. 
Columbia toOregon. There is a white flowered form with narrow perianth and 
narrower ovary but it has scarcely enough characters for a species. 
+ + Rootstock stout: stems naked or nearly so , usually tall: bracts 
contiguous or rarely separated. 
I. longipetala Herbert H. & A. Bot. Beech. 369. Stems stout, 1-14 
feet high, 3-5.flowered : leaves about as high, 3-5 lines broad: bracts foliace- 
ous, large and acuminate, 3-4 inches long: flowers very large, bright lilac, on 
stout pedicels 1-2 inches long, the tube funnelform, 3 lines long. outer seg- 
ments 21-3 inches long by 1-144 broad, narrowed toa short claw, white 
below and veined with violet, the midvein yellow: inner segments oblanceo- 
late, 2 incheslong: anthers shorter than the stigmas: style broadly crested: 
capsule oblong, narrowed at each end, 2 inches long: seeds flattened, nearly 3 
lines long. 1n moist meadows, eastern Washington to California. 
I. Missouriensis Nutt. Joarn. Acad. Philad. vii, 58. Stems rather 
