IRIDACB.fi. 113 



Outer segments of perianth larger, recurved or spreading; the inner erect or incurved: 



style-branches petaloid, curving over the linear anthers 1 



Segments nearly alike: stigmas filiform: filaments often united. 2 



1. IRIS, Tournefort. 



* Perianth-tube stem-like above the ovary, \-S in. long: stems leafy. 1, 2 



* * Perianth-tube short and funnelform above the ovary. 



Stems leafy: bracts (enclosing peduncles and buds) green, often distant 3, 4 



Stems naked or with 1 or 2 leaves, terete: floral bracts not distant 5, 6 



Stems with many bracts and rigid radical leaves 7 



Stems with 2-3 short bract-like leaves, 2-flowered 8 



1. I. macrosiplion, Torr. Stems very slender, flattened, surpassed by the dark 

 green grass-like leaves: flowers rich purple-blue, on short pedicels; tube 1-3 in. long; 

 sepals 1^-2 in. long. S. F. Bay to Ilumboldt Bay. Placer Co. 



2. I. Douglasiana, llerbcrt. Stouter and taller stems: leaves and bracts broader, 

 pedicels longer; tube shorter; sepals usually with a white center, blue-purplo or lilac: 

 often yellow or buff. S. F. Bay to Siskiyou Mts. 



3. I. Hartwegi, Baker. Stems slender, flattened, 2-9 in. high: leaves 2-3 lines wide: 

 flowers light colored. S, N. Mts. June. 



4. I. tenax, Dougl. Similar, taller, 1 -flowered: flowers larger, bright lilac-purple, 

 segments 2-2^ in. long. Or. to Br. Col. 



5. I. longipetala, Herbert. Stems stout, equaling the leaves, 3-5-flowered: sepals 

 lilac or whitish, purple and yellow veined, 2^-3 in. long. Monterey to Or. 



6. L Missouriensis, Nutt. More slender: leaves narrower: bracts dilated, scarious, 

 1-1^ in. long: flowers pale blue. N. Cal. to Or. 



7. I. bracteata, Watson. Leaves striate, sides unlike: perianth yellow, 2-3 in. long. 

 (IlowdVs Iris.) Discovered by Thos. Howell in S. W. Or., 18S4. 



8. I. tenuis, Wats. Perianth white, veined with yellow and purple, 1 in. long. 

 (Henderson's Iris.) Discovered by L. F. Henderson in Or., 1881. 



2. SISYBINCHIUM, Linnams. 



1. S. bellum, Wats. Flowers blue, purple-striped, -1 in. broad. Cal., Or. 



2. S. Calif ornicum, Ait. f. Scape winged: flowers yellow. Coast. Wet places. 



3. S. grandiflorum, DougL Flowers red-purple, 1-1J in. broad. N. CaL to Br. CoL 



LILIACEJS. 



I 1. Floral bracts not leaf-like: perianth persistent: anthers introrae: style entire, 



* Flowers in umbels or heads upon naked scapes: root a bulb or corm. 

 a. Perianth parted to the base or nearly so: stamens at base; anthers versatile. 

 18 



