IRIS FAMILY 



463 



Iris tenax Dougl. 



Tough-leaved Iris. 



Fig". 1132. 



Iris tenax Dougl.; Lindl. Bot. Reg. 

 1829. 



15: pi. 1218. 



Rootstock slender, usually short and form- 

 ing dense tufts. Stems slender 15-30 cm. 

 high, bearing several short bract-like leaves ; 

 basal leaves numerous, much longer than the 

 stem. 3-4 mm. wide, acuminate; bracts foli- 

 aceous, lanceolate, acute 3-5 cm. long; flow- 

 ers solitary bright lilac-purple, or sometimes 

 white; pedicels 15-25 mm. long; sepals 4-6 

 cm. long. 20-35 mm. wide, with a broad 

 claw ; petals nearly as long as the sepals, 

 spatulate ; perianth-tube about 5 mm. long ; 

 anthers 15-18 mm. long; capsule 20-25 mm. 

 long, oblong, obtuse at both ends ; seeds 

 scarcely flattened, obtusely angled. 



Open grassy places, Humid Transition Zone; 

 Washington to southern Oregon west of the Cascade 

 Mountains. Type locality: "a common plant in 

 north California and along the coast of New Georgia, 

 in dry soils or open parts of woods." The tough 

 fibrous leaves of this species, and perhaps of some 

 of the macrosiphon group are used by the Indians in 

 making nets and snares. 



4. Iris tenuis S. Wats. 

 Clackamas Iris. Fig. 1133. 



Iris tenuis S. Wats. Proc. Am. Acad. 17: 380. 1882. 



Rootstock very slender, only 2-4 mm. thick. Stems 

 20-25 cm. high, with 2 or 3 thin and scarious bract- 

 like leaves 5-7 cm. long; basal leaves very thin, equal- 

 ling or surpassing the stems, 8-12 mm. wide ; bracts 

 contiguous, 5-10 cm. long; flowers 2, on slender pedi- 

 cels equalling or exceeding the bracts, white lightly 

 striped and blotched with pale yellow and purple ; 

 sepals oblong-spatulate, about 3 cm. long; the petals 

 a little shorter, emarginate ; perianth-tube 4-6 mm. 

 long; capsule depressed-globose, 12 mm. in diameter. 



Open wooded slopes, Humid Transition Zone; Cascade Moun- 

 tains of northern Oregon, along the Clackamas River. Type 

 locality: "Eagle Creek, a branch of Clackamas River," Oregon. 



5. Iris hartwegi Baker. 



Hartweg's Iris. 



Fig. 1134. 



Iris hart'i'Cgi Raker, Card. Chron. II. 5: i2i. 1876. 



Rootstock slender, forming small tufts. Stems 

 slender and flattened, 10-30 cm. high, with 1-3 

 leaves ; basal leaves longer than or often much 

 surpassing the stem, 4-6 mm. wide, acuminate ; 

 bracts rarely nearly contiguous, linear-lanceolate 

 h-7 cm. long ; pedicels 2-7 cm. long ; flowers 2, 

 yellow with lavender veins, or pale lilac with 

 deeper colored veins and yellow medial portion ; 

 sepals 3-5 cm. long, about 12 mm. wide ; petals 

 a little shorter and narrower ; perianth-tube 

 stout, 6-7 mm. long; anthers 12 mm. long, equal- 

 ling the filaments ; capsule oblong. 2-3 cm. long, 

 acute at both ends, 3-angled ; seeds flattened and 

 angled. 



Open coniferous forests. Arid Transition Zone; Sis- 

 kiyou Mountains south through the Sierra Xevada to 

 Kern County. Type locality: Sierra Xevada, probablv on 

 the American River. 



Iris hartwegi australis Parish, Erythea 6: 86. 1898. „ „ _ ._ _ ..^_ _^ , 



lilac-purple; sepals mostly 5-6 mm. long, 20 mm. wide; anthers 20 'mm. long, a little exceeding' the "filaments" 



Open coniferous forests in dry soils, Arid Transition Zone; mountains of southern California, from the 

 .San Gabriel to the San Jacinto. Type locality: dry ridges of the San Bernardino Mountains at 4000 ft, 

 altitude. 



Usually larger than the typical species; flowers 



