KEY TO THE GENEEA OF MANHATTAN PLANTS. 27 



Order 82. SOLAN ACEAE. 



Fruit 2-ceIled, many seeded, a capsule or berry. Calyx inferior. 

 Herbs. 



219. Solatium. (Berry globose, black or yellow; seeds flat. Calyx per- 

 sistent at base of berry or in S. rostratum enlarged and prickly, enclosing 

 the berry which becomes dry at maturity.) 



220. Physalis. Berry globose, enclosed in the enlarged and inflated, 

 5-augled, papery calyx. Seeds flat. 



221. Datura. Capsule ovoid, beset with stout prickles, 4-valved. Pla- 

 centae 2 lobed, protruding from center of partition. A false partition 

 extends from the center of each placenta, making the capsule 4-celled 

 except near the top. Seeds flat, (kidney-shaped, pitted). 



Order 83. SCROPHULARIACEAE. 



Capsule 2-celled, many seeded (2-4-valved). Calyx inferior. Herbs. 



222. Verbascum. Capsules in spikes or racemes, globose, septicidally 

 dehiscent, 2-valved, valves 2 clef t, separating from partitions. Seeds 

 numerous, wrinkled. 



223 Scrophularia. Capsules (5-6 mm) in a terminal thyrsus, septicid- 

 ally dehiscent, valves beaked, a narrow portion of partition remaining at 

 axis. (Seeds papillate in longitudinal rows.) 



224. Pentstemon. Capsule (1-H cm) in a terminal thyrus, septicidally 

 dehiscent, valves inclined to split. (Seeds very angular.) 



225. Mimulus. Capsules (5-10 mm) axillary, enclosed in the (angular) 

 calyx, loculicidally 2-valved , valves sometimes 2-cleft. (Seeds plump, 

 sometimes winged, one-fifth to two-fifths mm). 



226. Conobea. Capsules 1 to few on capillary pedicels in the axils, 

 (4-valved, separating from axis. Placentae large. Seeds one-fifth mm 

 longitudinally grooved). 



227. Bacopa. Capsules 1 to few in the axils, on thick pedicels. (De- 

 hiscence as in Conobea. Seeds two-fifths mm, striate.) 



228. llysanthes. Capsules (5 mm) single in the axils, pedicels capillary. 



229. Veronica. Capsules racemed or axillary (flattened contrary to 

 partition, notched at apex. Dehiscence loculicidal or also septicidal. 

 Seeds concavo-convex or ovoid). Calyx lobes 4. • 



230. Gerardia. Capsules axillary, globose (4-valved, enclosed in hemi- 

 spherical calyx tube). " Seeds angulate." 



Order 84. LENTLBULARIACEAE. 



231. Utricularia. Capsule globose, 1-celled, many-seeded, placenta cen- 

 tral, " bursting irregularly " (Pedicels recurved, calyx 2-lipped, persist- 

 ent, inferior. Seeds oblong, i mm). Aquatic herbs. 



Order 85. OROBANCHACEAE 



232. Orobanche %Aphyllon. Capsule 1-celled, 2-valved. Seeds very small and 



