358 MANUAL OF BOTANY 



called channels {valleculce), h; in the pericarp are frequently oil- 

 receptacles called vittcE. Seed pendulous ; embryo minute,/, at 

 the base of abundant horny albumen, d ; radicle pointing to- 

 wards the hilum. 



Diagnosis. — Herbs or shrubs. Stems generally hollow ; 

 leaves alternate, usually compound and amplexicaul, or some- 

 times simple, and always exstipulate. Flowers arranged in 

 umbels, or rarely in capitula. CaAyx superior, inconspicuous. 

 Petals and stamens 5, inserted on the outside of a double 

 fleshy epigynous disc. Ovary hiferior, 2-celled, with a solitary 

 pendulous ovule in each cell ; styles 2. Fruit consisting of two 

 indehiscent carpels, which separate wlien ripe from a common 

 axis or carpophore. Each carpel bearing primary or secondary 

 ridges, or both. Seeds pendulous, one in each carpel, with a 

 minute embryo at the base of abundant horny albumen. 



Division of ilie Order and Illustrative Genera : — The order 

 has been divided into three sub-orders from the appearance of 

 the albumen, but these are by no means well defined. They 

 are as follows : — 



Sub-order 1. Orthosperme.^. — Albumen not curved. Illus- 

 trative Genera : — H5'drocotyle, Linn. ; (Enanthe, Linn. ; 

 Heracleum, Linn. 



Sub-order 2. Campylosperme.e. — Albumen rolled inwards at the 

 margms, and presenting a vertical furrow on its face. Illus- 

 trative Genera : — Anthriscus, Hoffm. ; Chserophyllum, Linn. ; 

 Conium, Linn. 



Sub-order 3. Ccelosperme^. — Albumen with the base and apex 

 curved inwards towards the axis. Illustrative Genera : — 

 Ormosciadium, Boiss. ; Coriandrum, Linn. 



. By Bentham and Hooker this order has been divided as 

 follows : — 



Series 1. Heterosciadie^e. — Umbels generally simple or very 

 irregularly compound, or the inflorescence is a capitulum, 

 Vittae absent or obscure. Illustrative Genera : — Hydrocotyle, 

 Linn. ; Astrantia, Linn. ; Eryngium, Linn. 



Series 2. Haplozygie.e. — Umbels compound. Primary ridges 

 of fruit alone conspicuous. Vittae usually, but not always, 

 obvious. Illustrative Genera: — Conium, Linn.; Myrrhis, 

 8cox>. ; Foeniculum, Adanson. 



Series 3. Diplozygie.e. — Umbels usuallj^ compound. Fruit 

 with both primary and secondary ridges generally well marked. 

 Illustrative Genera : - Caucalis, Linn. ; Daucus, Linn. 



