THE DICOTYLEDONES 1837 



I. Phyllantheae. The embryo is large, little shorter than the endo- 

 sperm. In the male flower the calyx is imbricated. Phyllanthus, 

 Wielandia, Petalodiscus, Hymenocardia, Bischofia, Toxicodendrum, 

 Aporosa, Baccaurea. 

 . 2. Bridelieae. The embryo is large, little shorter than the endosperm. 

 In the male flower the calyx is valvate. Bridelia. 

 3. Daphniphylleae. The embryo is short, about one-quarter as long as 

 the endosperm. DophniphyUum. 



II. Crotonoideae 



There is one ovule in each loculus. Laticiferous tissue and internal 

 phloem are usually present. 



1. Crotoneae. The stamens are bent sharply inwards in the bud. The 



calyx of the male flower imbricate or valvate, corolla generally 

 present. Crotori. 



2. Acalypheae. The stamens are erect in the bud, the calyx of the male 



flowers valvate, and the inflorescence racemose, axillary or 

 terminal. Mercurialts, Argithamnia, Acalypha, Mallotus, Ricinus, 

 Alchornea, Macaranga, Pera, Dalechampia, Caperonia and 

 Tragia. 



3. Jatropheae. The stamens are erect in the bud, the calyx of the male 



flower valvate or almost imbricated. These flowers may or may 

 not have a corolla. The inflorescence is a dichasium. Hevea, 

 Jatropha, Aleiirites. 



4. Manihoteae. The stamens are erect in the bud, the calyx of the male 



flowers is usually valvate and the inflorescence is racemose, being 

 either a terminal spike or a raceme. Manihot. 



5. Chiytieae. The stamens are erect in the bud, the calyx of the male 



flowers is imbricated and they possess a corolla. The inflores- 

 cence is cymose. Codiaeum, Chiytia. 



6. Gelonieae. The stamens are erect in the bud, the calyx of the male 



flowers is imbricated, the flowers are apetalous and the laticiferous 

 tissue is segmented. Geloniiim. 



7. Hippomaneae. The stamens are erect in the bud, the calyx of the 



male flowers is imbricated, the flowers are apetalous, but the 

 laticiferous tissue is not segmented. Stillingia, Hura, Hippomane, 

 Sapiiim, Mabea. 



8. Euphorhieae. The inflorescence is a cyathium. Euphorbia, Antho- 



stema, Synadenium. 



B. STENOLOBEAE 



Cotyledons as broad as the radicle. 



I. Porantheroideae 



There are always two ovules in the loculus. Poranthera. 



II. Ricinocarpoideae 



There is only one ovule in each loculus. Ricwocarpiis, Dysopsis. 



