316 BERBERIDACEAE 



or oblanceolate, 2-6 cm. long, spinulose dentate or entire, shining; racemes 

 6-10-flowered; sepals ovate to obovate, the inner 5-6 mm. long; berry ellipsoid, 

 about 6 mm. long. Mountains: Colo. N.M. Son. Submont. My-Je. 



2. ODOSTEMON Raf. OREGON GRAPES. 



Unarmed shrubs. Leaves pinnately compound, with spinose-toothed ever- 

 green leaflets. Flowers in erect fascicled or branched racemes. Filaments in 

 ours with a pair of divergent teeth near the apex. Berries usually with a bloom. 

 [Mahonia Nutt.] 



Fruit becoming dry and inflated at maturity; leaflets less than 3 cm. long. 



1. O. Fremonlii. 

 Fruit fleshy, not inflated at maturity, dark blue with a bloom; leaflets 3-10 cm. long. 



Leaflets 3-11; bud-scales ovate or rounded, deciduous. 



Prostrate, rising only 1-3 dm. over ground; leaves not very shining. 



2. O. Aquifolium. 

 Erect, 3-15 dm. high; leaves very shining. 3. O. nutkanus. 



Leaflets 13-17; bud-scales large, lanceolate, coriaceous, persistent. 4. O. nervosus. 



1. O. Fremontii (Torr.) Rydb. Shrub or small tree, 1-4 m. high, with 

 furrowed bark; leaflets 3-7 (rarely 9-11), coriaceous, ovate or oblong, grayish 

 green, 1-3 cm. long, sinuately 3-9-toothed; petioles very short; racemes 3-8- 

 flowered ; berries at first blue, ovate-globose, 6-8-seeded. Berberis Fremontii Torr. 

 Dry regions: w Tex. 'Colo. Nev. s Calif.; n Mex. Son. Ap-Je. 



2. O. Aquifolium (Pursh) Rydb. Stoloniferous dwarf shrub; leaflets 3-7, 

 oval or rarely ovate, acute to rounded at the apex, rounded or obliquely truncate 

 at the base, coriaceous, pale and strongly reticulate beneath, sinuately 9-19- 

 toothed, 3-9 cm. long; racemes many-flowered; berry ellipsoid-globose, 7-8 mm. 

 long. B. Aquifolium Pursh. B. repens Lindl. B. nana and B. brevipes Greene. 

 Hills and mountain sides: Alta. Neb. N.M. Calif. B.C. Submont. Mont. 

 Ap-Je. 



3. O. nutkanus (DC.) Rydb. A shrub, with yellowish smooth branches; 

 leaflets 5-11, coriaceous, ovate or lance-ovate, 5-10 cm. long, only slightly paler 

 beneath, less strongly reticulate, acute at the apex, usually obliquely truncate at 

 the base, sinuately 1 1-25-toothed ; raceme many-flowered; berry globose, about 

 1 cm. thick. B. Aquifolium Lindl., not Pursh. Hilly woods Ore. Ida. 

 w Mont. B.C. Submont. Ap-Je. 



4. O. nervosus (Pursh) Rydb. Stoloniferous shrub; stems 1-4 dm. high, 

 with light brown bark; leaflets shining, glaucescent, thick-coriaceous, ovate to 

 lanceolate, acute or acuminate at the apex, rounded at the base, spinulose- 

 dentate, with 15-30 teeth; racemes many-flowered, 1-2 dm. long; berry rounded- 

 ellipsoid, 8-10 mm. long. B. nervosa Pursh. Woods: B.C. Ida. Calif. Sub- 

 mont. Ap-My. 



FAMILY 50. PAPAVERACEAE Juss. POPPY FAMILY. 



Annual or perennial herbs, or rarely shrubby plants, with colored sap 

 and narcotic or acrid properties. Flowers perfect, regular. Sepals 2, or 

 rarely 3, caducous. Petals 4, 8, or 12. Stamens numerous; filaments dis- 

 tinct, often dilated. Gynoecium of 2 to many united carpels, forming a 

 1-celled ovary; placentae parietal; ovules numerous, anatropous. Fruit a 

 capsule; seeds numerous, with a fleshy or oily endosperm. 



Hypanthium not developed; calyx not calyptrate; pod not elongate, 3-20-carpellary. 

 Ovary many-lobed, in fruit breaking up into many follicles, which at maturity break 



off into 1-seeded joints ; leaves opposite. 1 . PLATYSTEMON. 



Ovary of two to many completely united and not separating carpels; leaves alternate. 

 Capsule opening by valves, at least at the summit. 

 Unarmed herbs; sepals neither horned nor hooded. 



Petals in age thin, scarious-persistent ; leaves basal, entire. 



2. ARCTOMECON. 

 Petals not scarious-persistent; stem leafy; leaves pinnately divided or 



lobed. 3. CHELIDONIUM. 



Prickly-leaved leafy-stemmed herbs; sepals hooded or horned; petals deciduous. 



4. ARGEMONE. 



