(38) 



D. Floral parts incomplete, inferior. 



1. Dirca.--Perigoniumcampannlate. Limb 

 obliquely truncate. Style subterininal. 

 Fruit a drupe. Slirub. 



2. Polygonum. — Perigonium 4-5 sepalous, 

 persistent. Stigmas 2-3. Fruit an 

 akene, enclosed in the persistent peri- 

 gonium. 



3. Acsena. — Calyx tube contracted at the 

 throat, angular, the angles armed with 

 glochidate prickles. Stigma penicillate. 

 Akene enclosed in the calyx-tube. 



II. Digynia and Trigynia. 



1. Polygonum. — Perigonium 4-5 sepalous, 

 persistent. Fruit an akene enclosed 

 in the perigonium. 



III. Tetragynia. 



1. Anemopsis. — Spadix with a several 

 leaved involucre. Perigonium 0. Ovar- 

 ies immersed in the rachis, 1-celled co - 

 ovuled. 



ENNEANDRIA. 



1. Oreodaphne. — Anthers with A^alvular de- 

 hiscence. Fruit a drupe resting on an 

 enlarged thalamus. Tree. 



2. Eriogonum — .Involucre Qo-flowered,cam- 

 panulate, 6-dentate. Styles 3. Fruit 

 an akene. 



