CHORIPETALAE 37 



409. Calyx with valvate aestivation. Disc wanting. Leaves stipulate. 



141. Tiliaceae. 

 Calyx with imbricate, contorted, or open aestivation 410 



410. Calyx with contorted aestivation. Disc wanting. Leaves undivided. 



Seeds albuminous ; embryo curved 154. Cistaceae. 



Calyx with imbricate, not contorted, or with open aestivation. Disc 

 ring-, cushion-, or cup-shaped 411 



411. Disc outside the stamens. Flowers usually irregular. Seeds with a 



copious albumen and straight embryo. Shrubs or trees. 



135. Melianthaceae. 

 Disc within the stamens. Flowers regular 412 



412. Leaves with translucent dots, exstipulate. . . . 115. Rutaceae. 

 Leaves without dots, stipulate 113. Zygophyllaceae. 



413. (405.) Anthers opening by i — 2 apical pores. Leaves opposite or whorled, 



exstipulate 181. Melastomataceae. 



Anthers opening by 2 longitudinal slits 414 



414. Calyx with valvate aestivation 173. Lythraceae. 



Calyx with imbricate aestivation. Stamens 10. Ovary 3-celled. Shrubs 



or trees. Leaves alternate, exstipulate 413 



415. Flowers polygamous, without bracteoles. Calyx shortly lobed. Filaments 



free. Anthers attached by the base. Fruit indehiscent. Leaves with 



translucent dots Psiloxylon, 180. Myrtaceae. 



Flowers hermaphrodite. Calyx deeply divided. Anthers attached by 

 the back. Fruit dehiscing loculicidally. Leaves without dots. 



Asteropeia, 148. Theaceae. 



416. (404.) Petals and stamens hypogynous 417 



Petals, and usually also the stamens, perigynous 433 



417. Stipules present, but sometimes minute and caducous 418 



Stipules wanting, but axillary spines sometimes present 428 



418. Calyx with valvate, closed, or open aestivation 419 



Calyx with imbricate or contorted aestivation 425 



419. Corolla with valvate aestivation 420 



Corolla with imbricate or contorted aestivation 421 



420. Petals toothed or laciniate. Anthers opening by a single pore or slit at the 



apex. Trees. Leaves undivided. Elaeocarpus, 139. Elaeocarpaceae. 

 Petals entire or emarginate. Anthers opening by 2 pores or shts. 



141. Tiliaceae. 



421. Ovary distinctly stalked. Stigma usually sessile. Petals with im- 



bricate, not contorted aestivation. Seeds exalbuminous. 



87. Capparidaceae. 

 Ovary sessile or nearly so. Petals usually with contorted aestivation. 422 



422. Anthers i-celled, opening by i slit or pore. Filaments united. Petals 



5 423 



Anthers 2-celled, opening by 2, rarely confluent slits or pores. . . 424 



