JCOSANDRIA. J49 



however, broader than those of the small branches. Nectaries cres- 

 cent-shaped, yellow a . 



4. DODECAGYNIA. 



6. SEMPERVIVUM. 



1. S. Tectorum (Houseleek\ leaves ciliated, offsets spreading. 

 Light/, p. 25 1 . E. B. I. 1320. 



HAB. On house-toprs and walls. Fl. July. 7/ . 



Thejlowers of this well known plant are no less beautiful than they 

 are curious in their structure. The number of stam. is in reality 

 24, of which 12, inserted 1 at the base of each petal, are perfect, the 

 rest alternating with the petals, small and abortive j some bearing 

 anthers, open longitudinally and laterally, producing, instead of pol- 

 len, abortive ovules : others resembling a cuneiform poin ted scale, 

 in the inside of which, upon a longitudinal receptacle, are likewise 

 ranged abortive ovules as in the real germen ; thus exhibiting the 

 most complete transition from stamens to germens in the same in- 

 dividual flower. 



XII. ICOSANDRIA. 



1. MONOGYNIA. 



1. PRUNUS. Cal. inferior, 5-cleft. Pet. 5. Nut of the Drupe 

 with slightly prominent seams. 



(Crataegus Oxyacantha, Ord. PENTAG.) 



(DIGYNIA, TRIGYNJA, TETRAGYNIA.) 



(Cratcegus Oxyaca?itha, Pyrus Aucuparia and Aria, 



Ord. PENTAG.) 



2. PENTAGYNIA". 



2. CRAT^EGUS. Cal. superior, 5-cleft. Pet. 5. Fruit pulpy, 

 closed , with from 2 5 2-seeded Nuts. 



3. PYRUS. Cal. superior, 5-cleft. Pet. 5. Apple with from 

 2 5 cells ; cells generally 2-seeded. 



4. SPIR^A. Cal. inferior, 5-cleft. Pel. 5. Pericarps 3 1 2, 1- 

 celled, 2-valved. Seeds 1 3 in each cell. 



3. POLYGYNIA. 



5. ROSA. Cal. (5-cleft), the tube urceolate, fleshy, including 

 many hairy pericarps (Achenia). Receptacle villous. Lindl. 



a I dare not introduce the E. Lathyrls into the Scottish Flora, since the 

 only station given by Mr. Hopkirk,in his FL Glott. t \s a garden at Barncluith. 



b The styles being very variable in this class, the Order PENTAGYNIA is 

 intended to include those genera which have from 2 5 Styles, as well as 

 Spiraa, in which genus some species have many styles. 



c In opposition to the open fruit of the true Muspilu* t or Medlar. 



