The Apogon Section 
38 
Diagnosis. 
I. tenuis Apogon ; I. Douglasianae haud dissimilis sed tenuior ; spathae scariosae ; segmenta 
interiora exterioribus breviora, emarginata. 
Description. 
Rootstock , a slender, very widely creeping rhizome. 
Leaves, thin, ensiform, about equal in length to the stems, pale green, 12 in. long by £ in. broad. 
Stem, about 12 in. long, bearing a reduced leaf near the base and at the insertion of the lateral 
peduncles, which are two or three in number. 
Spat he valves, scarious, an inch long, apparently 1 -flowered. 
Pedicel, short, ^ in. — | in. 
Ovary, elliptical. 
Tube, very short. 
Falls, oblong, spathulate, spreading, white marked with yellow at the throat and with blue-purple 
veins. 
Standards, erect, emarginate, slightly shorter than the falls. 
Styles, 
Crests , narrow, entire. 
Stigma, 
Filaments , equal in length to the anthers. 
A nthers. 
Pollen, 
Capsule, oblong, ovate, obtuse, § in. long. 
Seeds, 
Observations. 
This Iris, which does not appear to be at present in cultivation, was discovered in 1881 by 
Mr L. F. Henderson of Portland, Oregon, near a branch of the Clackamas River, called Eagle- 
creek, about thirty miles from Portland. It grew there in dense mats in the fir forests, its very 
long and slender rootstocks running along near the surface of the ground, just covered by moss or 
pardy decayed fir needles, with a light addition of soil. 
Owing to the slender character of its rhizomes it would probably be difficult to transplant and 
to establish unless a stock of seeds could be obtained. 
I. tenuis is at once distinguishable from all other Irises from Western America by its deeply forked 
stems. 
t XI. DR ACTE AT A 
S. Watson in Proc. Amer. Acad. XX. 375 (1885). 
Garden and Forest, 1888, 43. 
•Gard. Chron. xxxix. 1906, p. 401. 
Distribution. Oregon. 
Waldo and Dear Creek Mts, Oregon, 1887, Howell (K). 
Diagnosis. 
I. bracteata imberbis ; rhizoma gracile, radicibus perpaucis ; folia perpauca, superne levigata, inferne 
glaucescentia ; caulis monocephalus, bracteis brevibus omnino vestitus, foliis brevior ; terianthii tubus 
brevissimus ; stigma triangulare. 
Description. 
Rootstock, a slender, wide-creeping rhizome, branches few, growths scattered. 
Leaves, 1 2 — 24 in. long, linear, few in number, rigid, \ ^ in. broad, with a glossy upper- and 
glaucous under-surface. 
Stem, 4 — 6 in., sheathed in narrow acuminate bract-like leaves. 
Spathe valves, 3 — 4 in., narrow, acuminate, 2-flowered. 
Pedicel, 2 in. 
Ovary, f in., broader in the upper part and narrowing somewhat abruptly to the tube but tapering 
off gradually to the pedicel. 
Tube, funnel-shaped, very short, about ^ in. 
Falls. The broad oblanceolate blade narrows gradually to the broad haft. The blade is marked 
by four conspicuous veins, the inner pair being nearly parallel and continuing nearly to the apex ; 
the outer pair are more curved and fade away sooner, the colour of the veins being brown purple 
and that of the ground a bright yellow. 
Standards, lanceolate with a gradually tapering haft, of the same shade of yellow as the falls. 
Styles, keeled, narrow. 
Crests, large, subquadrate with serrated edges, revolute. 
Stigma, a triangular tongue. 
Filaments, bearing a few hairs near the base, shorter than the anthers. 
