140 



XI. DODECANDRIA 



I. MONOGYNIA. 



1. AsARUM. Pmaw//^ single, 3-fid, superior. Cop^. 6-celIed. 



2. Lv'THurM. Co/, inferior, with 12 teeth. P^^o/^ 6, inserted 

 upon the cal. Caps. ol)long, 2-celled. 



2. DIGYNIA. 



3. Agrimonia. Cal. 5-cleft, with a loljcd appendage (bractea) 

 at its base. Petals .5, inserted upon the cal. Pericarps 2 in 

 the bottom of the cal. 



3. TRIGYNIA. 



4. Reseda. Cc//. of 1 leaf, divided. Pe/a/i laciniated. Caps. 

 of 1 cell, opening at the top. 



5. Euphorbia. Per^an^/^ single, monoi)hyllous, in.ferior. Niec- 

 taries {petals Linn.) 4 — 5 inserted upon the perianth. Siam. 

 jointed. Caps, pedicellate, 3-lobed^. 



(TETRAGYNIA.) 

 {Tormentilla officinalis, Icos. Polyg.) 



4. DODECAGYNIA. 



6. Sempervivum. Cal. 12-cleft. Petals 12. Caps. 12. 



1. MONOGYNIA. 



I. ASARUM. 



1. A. eJiropcetim {Asaralacca), leaves bmate reiuform obtuse. 



E. B. t. 1083. 

 Hab. West Binny, near Linlithgow, Miss Liston. (Probably not 



really a native either of Scotland or of England.) Fl. May. 1/ . 

 Stem scarcely any, two opposite petiblated leaves springing almost 



^ Thi.s gives, it must he confessed, a veiy erroneous notion of the struc- 

 ture of the flowers in Euphorbia. Jussieu first, I believe, suggested the 

 idea of what had been hitherto considered a single flower, being an involu- 

 crnra, including 1 central phtilliferovs flower without anthers, and several 

 anther-bearing monandrous ones. Brown has proved this most satisfactorily ; 

 and further, that the support of the pistil has, at its summit, in some in- 

 stances, a 3-lobed cal.; and that the joint in the supposed filaments, is in 

 reality the termination of the flowerstalk, on which the stamen is seated, 

 without a trace of a perianth. See Mr. Brown's learned Dissertation on the 

 Botany of N. Holland, appended to Flinders' Foyage, and Linn. Trans. 

 V. 12. p. 99. 



