910 ARBORETUM AND FRUTICETUM. PART III. 



P. Sieve" rs\\ Led. Fl. Alt., 2. p. £22., Bon's Mill., 2. p. 647. ; P. nov. sp. Sievers in Pall. Nord. 

 Beitr., 7. p. 292., is a bush, with many steins rising from the same root ; with ovate leaves rather 

 tomentose, ami umbellate flowers, succeeded by very acid fruit. It is a native of Siberia; and it is 

 rather remarkable that it has never been introduced into England. 



§ iii. AY/a Dec. 



Sect. Char., eye. Petals spreading, flat. Styles mostly 2 — 3. Pome globose. 

 Flowers in racemose corymbs; the peduncles branched. Leaves simple, 

 not glanded, whitely tomentose beneath. (Dec. Prod., ii. p. 635.) Deciduous 

 trees, natives of various parts of Europe, and of Asia; chiefly found on 

 dry, calcareous, or clayey soils, and varying much in a state of culture. The 

 species and varieties are in a state of great confusion. 



¥ 21. P. A y Ri\ Ehrh. The White Beam Tree. 



Identification. Ehrh. Beitr., 4. p. 20. ; Dec. Prod., 2. p. 636. ; Don's Mill., 2. p. 647. 



Syyionymes. Crataegus ^Tria var. a, Lin. Sp., 681. ; iV/^spilus A'r'ia Scop. ; Sort us AYxa Crantz 

 Austr., 1. t. 2. f. 2. ; Bauh. Hist., 1. p. 65. ; //Via Theophrast* L'Obel. ; white wild Pear, white Leaf 

 Tree, red Chess- Apple, Sea Ouler, Cumberland Hawthorn Gerard; AlisierAHouchier, Alisierblanc, 

 Ft: ; Mehlbeerbaum, or Mehlbaum, Ger. ; Aria, or Sorba pilosa.ita/. ; Mostaco, Span. ; Axelbeer, 

 Ban. ; Oxilbear, Swed. 



Berivation. A\\vl, the name given to this tree by Theophrastus, is probably from the name of that 

 country in Asia. The White Beam Tree is a pleonasm, beam being the Saxon word for tree. The 

 word Allouchier is from allouchion, the cog of a wheel, the wood of the tree being much 

 used for that purpose in France. Mehlbaum is literally the meal tree, from the mealy appearance 

 of the under side of the leaves. 



Engravings. Crantz Austr., 1. t. 2. f. 2. ; Eng. Bot, 1. 1858. ; Fl. Dan., t. 302. 



Spec. Char., eye. Leaves ovate, doubly serrated, tomentose beneath, with ap- 

 pressed white tomentum. Corymbs flat. (Dec. Prod., ii. p. 636.) 



Varieties. 



$ P. A. 1 obtusifdlia Dec. Prod. ii. p. 636., and Fl. Dan., t. 302.; P. A. 

 ovalis Hort. — Leaves broadly ovate, and obtuse. 

 P. A. 2 acutifolia Dec. Prod., 1. c. ; Crataegus longifolia N. Du Ham., 

 4. t. 34.; ? Pyrus alpina Willd. Enum., 527.; which has ovate-oblong 

 acute leaves. 

 ¥ P. A. 3 unduldta Lindl. Hort. Trans., vii. p. 234., and our plate in Vol. 

 II., has the leaves flat, oval-lanceolate, broad, undulated, unequally 

 and deeply serrated, acuminated, and cobwebbed above. 

 3f P. A. 4 angustifolia Lindl., 1. c, has the leaves oval, obtuse, concave, 



somewhat simply serrated, woolly above. 

 >£ P. A. 5 rugosa Lindl., 1. c. — Leaves large, ovate-elliptic, doubly ser- 

 rated, shining above and wrinkled, white beneath. 

 3f P. A. 6 cretica Lindl., I.e.; P. A. rotundifolia Hort. ; P. grae v ca Hort. 

 — Leaves flat, orbicularly elliptic, crenately serrated, retuse, cune- 

 ated at the base ; smooth above, and hoary beneath. Branches 

 cobwebbed. 

 % P. A. 7 Indlata Lindl. Hort. Trans., vii. p. 234. ; P. A. acuminata 

 Hort.', has the leaves concave, elliptic, acuminated, blistered; closely 

 serrated at the apex, but entire at the base. 

 Description, eye. This tree rises to the height of 30 ft. or 40 ft. in favour- 

 able situations, with a straight, erect, smooth trunk, and numerous branches, 

 which for the most part tend upwards, and form a round or oval head. The 

 young shoots have a brown bark, covered with a mealy down ; the leaves are 

 between 2 in. and 3 in. long, 1^ in. broad in the middle, light green above, and 

 very white and downy beneath. The flowers are terminal, in large corymbs, 

 2 in. or more in diameter, and they are succeeded by scarlet fruit, which makes 

 a very conspicuous appearance in the autumn, but of which the tree seldom 

 bears two good crops in succession. The rate of growth, when the tree is 

 young, and in a good soil, is from 18 in. to 2ft. a year: after it has attained 

 the height of 15 ft. or 20ft. it grows much slower; and, at the age of 

 twenty or thirty years, it grows very slowly; but is a tree of great 

 duration. The roots descend very deep, and spread very wide; and the head 

 of the tree is less affected by prevailing winds than almost any other. In the 

 most exposed situations, on the Highland mountains, this tree is seldom seen 



