80LANACRE. (POTATO FAMILT.) 88a 



Corolla rotate; fruit a berry Solanum. 1 



Corolla funnel-form; capsule large, spiny Datura. 2 



Corolla funnel-form; capsule smooth Nicotiana. 3 



1. SOLANUM, Tourn. 

 Lobes of the corolla valvate in the bud. Filaments short; anthers usually conniving. 

 Style elongated. 



• Corolla small white; deeply 5-deft. 



1. S. nigrum, L. (Black Nightshade.) Widely branching; leaves usually ovate 

 and sinuate toothed; flowers in umbellate clusters; berries black. Variable. 



Var. Douglasii, Gr. Leaves apt to be coarsely toothed; flowers sometimes half an 

 inch broad. 



• * Corolla large, blue, 5-angled. 



2. S. umbelliferum, Esch. Somewhat shrubby; flowers in umbel-like clusters, 

 violet-blue to rarely white, about 9 lines broad. A variable species similar to S. Xanti, 

 which is less shrubby and has larger flowers, a common species farther south. 



2. DATURA, L, Stramonium. 



Calyx prismatic, partly deciduous. Corolla with ample 5-pointed limb. Style lonp;; 

 stigma 2-Iipped. Capsule spiny. 



L D- Stramonium, L. Smooth, green; corolla white, about 3 inches long; cap- 

 sule beset with short, stout prickles, the lower shorter. 



2. D. Tatula, L. Stem reddish-purple; corolla pale violet; prickles about equal. 



3. D. quercifolia, HBK. Green; corolla violet-tinged; prickles flattened, unequal, 

 some an inch long. — Lower Russian River. 



3. NICOTIANA, Tourn. Tobacco. 

 Calyx campanulate or oblong, persistent. Corolla commonly funnel-form, the limb 

 plaited. Style long; stigma capitate, somewhat 2-lobed. — Very viscid herbs. 



1. N. rustica, L. Leaves petioled, ovate, or the lower slightly cordate; corolla 

 short and broad, dull white, less than an inch long. 



2. N. Bigelovii, Wat. Leaves oblong or oblong-lanceolate, only the lower ones 

 petioled, these scarcely exceeding 6 inches long; corolla nearly salver-form with tube IJ 

 inches long, the limb an inch or more wide, its lobes acute. 



3. N. attenuata, Torr. (SlenI)ER Tobacco.) Leaves petioled, the lower ovate or 

 oblong, the upper lanceolate to linear lanceolate; calyx teeth short; corolla greenish 

 white, salver-form, an inch or more long, and a half an inch or less across. Slender 

 plants 3 or 4 feet high iu cultivated ground. 



4. N. glauca, Graham. (Tobacco Tree.) A small tree, commonly cultivated; 

 smooth, glaucous leaves long-petioled; tubular corolla greenish yellow, an inch or more 

 long. 



