CL. XXI.] MONCECTA POLYANDRIA. 363 



Fertile Flowers above the others. Calyx as above. Corolla 

 of one petal, wheel-shaped ; tube short, closed at the mouth ; 

 limb with four deep, egg-shaped, reflected, permanent seg- 

 ments. Germens one or two, oblong, two-celled, crowned with 

 a hair-like, coloured style, much longer than the corolla. 

 Stigma rayed, coloured. Nut invested by the dry tube of the 

 corolla, one or two-celled. Kernels oval, solitary. Name from 

 poterium, a drinking cup. 438. 



1. P. Sanguisorba. Salad- Bur net. Thornless, stem somewhat 



angular. Stems from one to two feet high, smooth, branched : 



leaves pinnate, with an odd leaflet : heads of purple flowers, glo- 

 bular. Perennial : flowers in July : grows in dry pastures : fre- 

 quent. Eng. Bot. vol. xii. pi. 860. Eng. Fl. vol. iv. p. 147. 1364. 



20. QUE'ECUS. OAK. 



Barren Flowers in a loose catkin, deciduous. Calyx a scale 

 of one leaf, deeply divided into several segments. Corolla none. 

 Filaments eight or more, awl-shaped, short ; anthers roundish, 

 two-lobed. 



Fertile Flowers in separate catkins. Calyx double ; the outer 

 inferior, hemispherical, leathery, one-flowered, entire, becoming 

 enlarged and externally scaly or tuberculated ; the inner su- 

 perior, of one leaf, with six minute downy segments, closely 

 surrounding the base of the style. Corolla none. Germen 

 one, below the inner calyx, globular, three-celled, with rudi- 

 ments of six seeds. Nut solitary, oval, leathery, one-celled. 

 Kernel solitary, rarely two. Name, Celtic, from quer, beauti- 

 ful, and cuez, a tree. 439. 



1 . Q. Robur. Common Oak. Leaves deciduous, oblong, dilated 

 towards the end, sinuated and lobed, the sinuses rather acute, the 



lobes obtuse ; fruit-stalks elongated. A large tree, with round 



spreading branches : in the Highlands of Scotland, where it is 

 abundant in an indigenous state, it seldom attains a large size : the 

 uses of the wood and bark are well known. Flowers in April : 

 grows in natural woods, in the uncultivated parts of the country. 

 Eng. Bot. vol. xix. pi. 1342. Eng. Fl. vol. iv. p. 273. 1365. 



2. Q. scssiliflora. Sessile-fruited OaJc. Leaves deciduous, oblong, 



on elongated stalks, with opposite acute sinuses ; fruit sessile. 



This species is distinguished from the former by its more regularly 

 sinuated leaves and sessile fruit: the wood is said to be much in- 

 ferior, but this appears to be erroneous. Flowers in April : grows 

 in woods. Eng. Bot. vol. xxvi. pi. 1845. Eng.Fl. vol. iv. p. 150. 1366. 



21. FA'GUS. BEECH. CHESTNUT. 



Barren Flowers in a roundish or cylindrical catkin. Calyx 

 of one leaf, divided into five or six segments. Corolla none. 

 Filaments from five to twenty, hair-like, longer than the calyx ; 

 anthers roundish or oblong, two-lobed. 



Fertile Flowers stalked. Calyx double ; the outer inferior, 

 leathery, externally prickly, with four, five, or six deep seg- 



