CL. XXI.] MONffiCIA 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 segments. Ger- 

 mens one or two, oblong, two celled, crowned with a hair-like, 

 coloured style, much longer than the corolla. Stigma rayed, co- 

 loured. 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. Sawguisnrba. Salad-Burnet. Thornless ; stem somewhat an- 

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



pinnate, with an odd leaflet : heads of purple flowers, globular. Peren- 

 nial : flowers in July : grows in dry pastures : frequent. Eng. Bot. vol. 

 xii. pi. 860. En*. Fl. vol. iv. p. 147. 1364. 



20. QUE'RCUS. 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 superior, 

 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 rudiments of six seeds. 

 Nut solitary, oval, leathery, one-celled. Kernel solitary, rarely 

 two. Name, Celtic, from quer, beautiful, and cuez, a tree. 439. 



1. Q. Edbur. Common Oak. Leaves deciduous, oblong, dilated to- 

 wards 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. sessitifidra. Sessile-fruited Oak. 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 inferior, 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 segments, 



