X LINN^AN ARRANGEMENT 



sagittate, connivent, adhering to the stigma. Follicles slender, elongated, 

 coriaceous. Apocynacea, p. 231. 



GONOLOBUS. Calyx 5-parted. Corolla rotate, 5-parted. Stamineal 

 crown scutelliform, 5-lobed. Anthers opening transversely, terminated by 

 a membrane. Pollen-masses 5 pairs, not separating into grains. Follicles 

 2, ventricose. Asclepiadacece, p. 235. 



ASCLEPIAS. Calyx small, 5-parted. Corolla 5-parted ; the lobes lanceo- 

 late, reflexed. Stamineal crown 5-leaved ; leafets opposite the anthers, 

 each mostly producing from its base a subulate averted process or little 

 horn. Pollen-masses 5 distinct pairs, compressed, affixed by their atten- 

 uated summits in the cells of the anthers. Follicles ventricose, smooth or 

 muricate. Asclepiadacea, p. 232. 



GENTIANA. Calyx 4 5-cleft. Corolla tubular-campanulate, funnel- 

 form or somewhat salver-form ; the limb 4 5-cleft, sometimes with inter- 

 mediate plaits. Stamens included. Capsule 1-celled, 2-valved. Gentiana- 

 cea, p. 236. 



CUSCUTA. Calyx 5- (rarely 4-) parted. Corolla globose-urceolate, 4 5- 

 cleft. Filaments often with scales at the base. Capsule 2-celled, opening 

 all round transversely. Cuscutacecs, p. 246. 



** Perianth double, inferior. Corolla 5-petalled. 



HEUCHERA. Calyx campanulate, coherent with the ovary below, 5-cleft. 

 Petals 5, small, entire. Capsule with 2 beaks, 1-celled, many-seeded. 

 Saxifragacete, p. 127. 



***' Perianth double, superior. Corolla 5-peUilled. Fruit fleshy. 



PANAX. Calyx with the margin very short, and obsoletely 5-toothed. 

 Styles 2 3, short. Fruit fleshy, compressed, orbiculate or didymous, 2- 

 celled; cells 1-seeded. Araliacete, p. 141. 



**** Perianth double, superior. Corolla 5-petatted. Fruit of 2 carpels. 



OBS. The genera of this division form the Natural Order Umbelliferaz, 

 p. 129. 



***** Perianth single. 



ATRIPLEX. Flowers monoecious or dioecious, rarely perfect. STERLLR 

 FL. without bracts. Perianth 3 5-parted, without appendages. FERTILE 

 FL. with 2 bracts at base. Perianth none. Utricle compressed, partly in- 

 cluded in the bracts, 1-seeded. Chenopodiaceee, p. 298. 



CHENOPODIUM. Perianth 5-parted, closing upon but not wholly envelop- 

 ing the fruit, Utricle thin, membranaceous. Seed lenticular. Chenopndi- 

 acecp,, p. 296. 



SALSOLA. Perianth 5-cleft, persistent, enveloping the fruit with its base, 

 and crowning it with its enlarged limb. Chenopodiacea, p. 299. 



ULMUS. Perianth campanulate, 5 8-cleft. Stamens 5 8. Fruit (a 

 samara) flat, with a membranaceous border. Ulmace<z, p. 334. 



CELTIS. Polygamous. STERILE FL. Perianth inferior, 5 6-parted. 

 PERFECT FL. Perianth deeply 5-parted. Drupe globose, 1-seeded. Ulma- 

 cea, p. 335. 



