iroSANDKIA. J49 



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

 cent-shaped, yellow^. 



4. DODECAGYNIA. 



6. SEMPERVIVUM. 



1. S. Tectorum {Houseleek), leaves ciliated, offsets spreading. 

 Light/, p. 23 \. E.B.t.\S20. 



Hab. On house-tops and walls, i^. July. 11- 



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

 are curious in their structvn-e. The number of starn. 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 ; some bearing 

 anthers, o\:>en 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 gerinen ; — thus exhibiting the 

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

 dividual flower. 



XII. ICOSANDRIA. 



1. MONOGYNIA. 



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

 with slightly prominent seams. 



{CratcBgus Oxyacantha, Ord. Pentag.) 



(DiGYNIA, TrIGVXIA, TkTRAGYMA.) 



(Cratcegus Oxyacautha, Pyrus Aucuparia and ylria^ 

 Ord. Pentag.) 



2. PENTAGYNIAN 



2. Crataegus. Cal. superior, 5-cleft. Pel. 5. Fruit pulpy, 

 elosed "^j with from 2 — 5 2-seeded Ntds. 



3. Pyrus. Ca/. superior, 5-cleft. Pet. 5. Apple v/\th from 

 2 — 5 cells ; cells generally 2-seeded. 



4. Spir^a. Ca/. inferior, 5-cleft. Pel. 5. PericarpsS — 12, 1- 

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



3. POLYGYNIA. 



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

 m3.ny hsLiry pericarps {Ache?iia). Receptacle viWous. Lindl. 



* I dare not hitroduce the E. Lafkijris into the Scottish Flora, since the 

 only station given by Mr. Hopkirk,in his Fi. Glott., is a garden at Barncluith. 



''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 

 Spir<xa, in which genus some species have many styles. 



'- In opposition to the open fruit of the true Itliispiht, or Medlar. 



