Xlii 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. Asclepladacece, 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. Cuscutacece, p. 246. 



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



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

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

 Saxifragacece, p. 127. 



*** Perianth double, superior. Corolla 5-petalled. Fruit Jleshij. 



Panax. Calyx with the*lnargin very short, and obsoletely 5-toothed, 

 Styles 2 — 3, short, l^iuit fleshy, compressed, orbiculate or didymous, 2- 

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



**** Pei-iarUh double, superior. Corolla b-petafied. Fruit of 2 carpels. 



Obs. The genera of this division form the Natural Order Umbellifera, 

 p. 129. 



***** Perianth single. 



Atriplex. Flowers monoecious or dioecious, rarely perfect. Sterile 

 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. Chenopodiacece, p. 298. 



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

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

 acecB, p. 296. 



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

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



Ulmus. Perianth campanulate, 5-^8-cleft. Stamens 5 — 8. Fruit (a 

 samara) flat, with a membranaceous border. IJlmaccce, 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. 



