II UMBELLlFER.i; 209 



Petroselinum 



P. sativum (Parsley) occurs as a garden escape. 

 The £o^^'ers are greenish yellow, whereas 



P. segetum, a native in Central and South England, 

 has white flowers. 



Trinia 



T. vulgaris. — A rare plant, found on limestone rocks 

 iu Devon and Somerset, has dioecious Howers ; the males 

 have narrower petals than the females. 



Apium 



We have three species. A. nodiflorum has ovate or 

 lanceolate leaflets, while in A. inundatum they are 

 almost filiform, probably in consequence of being sub- 

 merged. Both species have partial involucres of several 

 bracts. A. graveolens, on the contrary, has none. 



A. nodiflorum. — According to Knuth this species is 

 markedly protandrous, and the secretion of honey ceases 

 when the anthers have shed their pollen, commencing 

 again when the stigmas reach maturity. 



JEgopodium 



A. Podagraria (Goutweed). — According to Warnstorf 

 the umbels of the first order have complete flowers, 

 while those of the second have male flowers in the 

 centre and complete ones round the outside. Over a 

 hundred insects are recorded as visitors of this species, 

 which is a doubtful native occurring in waste places 

 near buildings or gardens. 



Carum 



Of this genus we have three species— C. tuberosum, 

 with tubers ; C verticillatum, with leaves apparently 

 in whorls ; and C Carui, the Caraway ; the last not 

 native, but naturalised in waste places. 



C. Carui. — According to Warnstorf, in some of the 

 flowers the anthers produce no pollen. 



p 



