SOLANACEAE 991 



16. Solanum Torreyi A. Gray. Perennial, cinereous with somewhat scurfy pubes- 

 cence, sparingly armed with subulate prickles. Stems erect or ascending, 3-8 dm. tall, 

 slightly branched : leaf-blades oblong to oval in outline, 6-15 cm. long, sinuately lobed, 

 cuneate to subcordate at the base : petioles J as long as the blades or shorter : pedicels 

 prickly and closely pubescent : calyx densely pubescent ; tube campanulate ; lobes rather 

 ovate, abruptly contracted into subulate tips : corolla 2.5-3 cm. broad, blue or white ; 

 lobes triangular-ovate : berries subglobose, 1-1.5 cm. in diameter, yellow. 



In sandy soil, Kansas to Arkansas. Spring and summer. 



17. Solanum aculeatissimum Jacq. Shrubby, sparingly pubescent or glabrate, 

 armed to the flowers with subulate prickles. Stems 3-7 dm. tall, branching : leaf-blades 

 membranous, ovate or suborbicular in outline, 6-1 2 cm. long, angulately-toothed or sinu- 

 ately-pinnatifid, truncate or cordate at the base : petioles J as long as the blades or shorter : 

 calyx bristly ; lobes oblong to ovate, as long as the tube or longer : corolla white, 12-18 

 mm. broad ; lobes lanceolate, recurved : berries subglobose, yellow, 3-6 cm. in diameter. 



In sandy soil, North Carolina to Florida and Texas. Throughout the year. 



18.* Solanum sisymbriifolium Lam. Annual, villous, bright green, armed often to 

 the flowers with subulate prickles. Stems erect, 3-7 dm. tall, widely branching ; leaf-blades 

 oblong or oval in outline, 8-20 cm. long, deeply pinnatifid, the segments oblong or lanceo- 

 late, sinuate or pinnatifid, commonly acute : pedicels bristly and glandular-pubescent : 

 calyx bristly ; lobes lanceolate, much longer than the campanulate tube : corolla white or 

 light blue, 3-4 cm. broad : berries subglobose, 1.5-2 cm. in diameter. 



In waste places, Gulf States and contiguous territory. Introduced from the tropics. Throughout 

 the year. 



19. Solanum rostratum Dunal. Annual, hoary or yellowish pubescent, copiously 

 armed with subulate prickles. Stems 2-7 dm. tall, more or less widely branching : leaf- 

 blades 5-12 cm. long, once or twice pinnatifid ; segments coarse, undulate or sinuate : 

 pedicels barely enlarged upward : calyx bristly ; lobes linear-lanceolate, longer than the 

 campanulate tube : corolla yellow, about 2.5 cm. broad ; lobes broadly ovate : berries sub- 

 globose, each enclosed in a closely armed calyx. 



In waste places and on prairies, South Dakota to Tennessee, Mississippi and Mexico. Adventive 

 eastward. 



6. LYCOFERSICON Mill. 



Annual or rarely perennial herbs, with strong-smelling herbage and often clammy 

 pubescent foliage. Leaves alternate : blades 1-2-pinnately divided. Flowers in lateral 

 raceme-like cymes. Calyx spreading : tube short : lobes 5 or 6, narrow. Corolla yellow, 

 rotate : tube very short : limb plaited, spreading : lobes 5 or 6. Stamens 5 or 6, exserted. 

 Filaments very short. Anthers elongated, converging or connate, opening lengthwise and 

 introrsely. Ovary 2-several-celled. Stigma capitate. Berries very pulpy, subglobose or 

 pear-shaped, or variously modified in cultivation. Seeds numerous, flattened. TOMATO. 



Berries several-celled. 1. L. Lycopersicon. 



Berries 2-celled. 2. L. cerastforme. 



1. Lycopersicon Lycop6rsicon (L. ) Karst. Annual, pubescent and clammy. 

 Stems erect or decumbent, 3-10 dm. long, branching, stout : leaf-blades 1-2-pinnate, 1-4 

 dm. long, the main leaflets ovate or oblong, coarsely toothed, incised or parted, 3-8 cm. 

 long, the smaller ones more or less numerous : calyx-lobes linear or nearly so, 1-2 cm. 

 long, acute : corolla yellow : berries subglobose or flattened, mainly red, several-celled. 



In waste places and about gardens, chiefly about towns and cities, eastern United States. Summer. 



2. Lycopersicon cerasiforme Dunal. Similar to the preceding species in habit, but 

 more slender and weaker. Leaves smaller : berries globose, 2-celled. 



In dry soil, southern Texas. Native of tropical America, Spring to fall. 



7. PERIZOMA Miers. 



Herbs or shrubby plants. Leaves alternate : blades entire. Flowers solitary in the 

 axils. Calyx barely accrescent of 5 narrow partially united sepals. Corolla white or yel- 

 low, urn-shaped or somewhat tubular, the lobes valvate-induplicate in the bud. Stamens 

 5, adnate to the lower half of the corolla tube : anthers converging around the style. 

 Ovary sometimes depressed, sessile : style slender. Berry globular or oblong. 



1. Perizoma rhomboidea ( Hook. ) Small. Stems branched, the branches spreading 

 or reclining, usually again much-branched : leaf-blades ovate, 1-2.5 cm. long, obtuse or 



