80LANACEAE 981 



Anther-sacs opening lengthwise and introrsely. 6. Lycopersicon. 



b. Corolla little if at all plicate ; lobes imbricate, valvate or valvate-induplicate. 



Anthers converging around the style : corolla urn-shaped. 7. Perizoma. 



Anthers not converging : corolla rotate or salverform, or funnelform. 



Stamens adnate to the base of the corolla-tube : corolla rotate. 8. Capsicum. 



Stamens adnate to the middle or the mouth of the corolla-tube : corolla 

 salverform to funnelform. 

 Stamens unequal : filaments adnate to the mouth of the corolla- 

 tube: seeds flattened. 9. Lycium. 

 Stamens equal or nearly so : filaments adnate to about the middle of 



the corolla-tube : seeds not flattened. 10. Cestrum. 



B. Fruit a capsule : corolla funnelform. 



Capsules armed with prickles. 11. Datura. 



Capsules unarmed. 



Flowers in racemes or panicles : filaments nearly equal in length. 12. Nicotiana. 



Flowers solitary in the axils or opposite the leaves : filaments unequal in 

 length. 

 Sepals nearly distinct : anther-sacs distinct. 13. Petunia. 



Sepals united to above the middle : anther-sacs somewhat confluent. 14. Bouchetia. 



1. PHYSALODES Boehm. 

 Annual caulescent herbs, with deep green foliage. Leaves alternate ; blades broad, 

 sinuate-toothed or lobed. Flowers nodding, solitary in the axils. Calyx accrescent, 

 angled, inflated at maturity : sepals nearly distinct, cordate or sagittate at the base. 

 Corolla blue or violet, plicate in the bud, campanulate, slightly 5-lobed. Stamens 5, in- 

 cluded : filaments adnate to the base of the corolla, filiform from a dilated and pubescent 

 base : anther-sacs opening lengthwise. Ovary 3-5-celled : stigma 3-5-lobed. Berry sub- 

 globose, rather dry, enclosed in the calyx. {^Nicandra Adans.] 



1. Physalodes Physalodes (L. ) Britton. Plant nearly glabrous. Stems 3-9 dm. 



tall, widely branching : leaf-blades ovate, oval or oblong, 5-15 cm. long, angulately lobed 



or sinuate, narrowed into margined petioles: pedicels puberulent, recurving: calyx 1.5 



cm. becoming 3.5 cm. long, reticulated ; sepals broadly ovate, narrowed into slender tips : 



corolla blue or violet, 2.5 cm. broad; limb nearly entire: berries 1.5-2 cm. in diameter. 



In waste places, eastern Canada and the Atlantic United States. Naturalized from Peru. Summer 

 and fall. 



2. PHYSALIS L.' 



Annual or perennial herbs, sometimes a little woody at the base, with simple or branch- 

 ing hairs, or glabrous. Leaves alternate : blades entire or sinuately toothed. Pedicels 

 generally solitary from tke axils of the leaves, but sometimes in clusters of 2-4. Calyx 

 campanulate, 5-lobed, accrescent, membranaceous, 5-angIed or prominently 10-ribbed and 

 reticulate, wholly enclosing the pulpy berry : lobes in most cases connivent. Corolla yel- 

 lowish or whitish, often with a much darker, brownish or purplish center, open campanu- 

 late or rarely campanulate-rotate, plicate, with very short and broad lobes which are slightly 

 imbricate in the bud. Stamens adnate to the base of the corolla. Antlier-sacs opening by 

 longitudinal slits. Stigma minute. Seeds numerous, kidney-shaped, flattened, with a thin 

 edge, finely pitted. Tlie plants flower in summer, or from spring to fall in the South. 

 Ground Cherry. Jerusalem Cherry. 



A. Annuals, with much branched roots. 

 Plants more or less viscid pubescent. 



Fruiting calyx sharply 5-angled, deeply sunken at the base, calvx-lobes at flowering time fully as 

 long as the tube. 

 Fruiting calyx not long-acuminate : leaf-blades very oblique. 



Leaf-blades ovate, subentire at the base : stem slender, diffuse, sharply angled. 



Leaf-blades cordate, strongly sinuately toothed to the base : stem ob- 

 tusely angled. 

 Leaves broadly rounded, cordate, 2-5 cm. long: stem weak, diffuse. 2. P. Ploridana. 

 Leaves elongated, cordate, 4-10 cm. long : stem stout. 3. P. pruinosa. 



Fruiting calyx long-acuminate : leaf-blades scarcely oblique at the base, 



cordate, abruptly acuminate. 4. P. Barbadeims. 



Fruiting calyx obtusely or indistinctly 5-10-angled ; calyx-lobes at flowering 

 time shorter than the tube (except sometimes in P. Carpenten). 

 Leaf-blades not long-acuminate : flowers solitary. 5. P. Lagascae. 



Leaf-blades long-acuminate : flowers often fascicled. 6. P. Carpenteri. 



Plants glabrous or only the upper parts sparingly beset with short hairs (P. 

 ixocarpa sometimes a little puberulent when young). 

 a. Fruiting calyx sharply 5-angled, deeply sunifen at the base. 7. P. obscura. 



1 Contributed by Dr. Per Axel Rydberg. 



