CHAP. XLII. ROSA‘CEZ P‘YRUS. 915 
gated exactly in the same manner as P. A‘ria. There being no varieties, it 
does not require to be continued by grafting. 
Statistics. In the environs of London, at Syon, it is 30 ft. high ; in the Fulham Nursery, 40 years 
years planted, it is 30 ft. high ; in Staffordshire, at Arley Hall, there is the fine specimen mentioned 
above, which is 542 ft. high"; in Wiltshire, at Longleat, 65 years planted, itis 55 ft. high. In France, 
at Laye, near Passey, 50 years planted, it is 50 ft. high ; at Nantes, in the nursery of M. De Nerriéres, 
and in the neighbouring woods, it is 50 ft. high. InSaxony, at W6rlitz, 44 years planted, it is 30 ft. 
high, In Austria, near Vienna, at Briick on the Leytha, 40 years planted, it is 30 ft. high. 
App. i. Other Species of Pyrus belonging to the Section 
Torminaria. 
P. rivularis Doug. in Hook. 
Fl. Bor, Amer., \. p.203. t- 
68., and our figs. 642. and 
645., is a small tree, with 
__ ovate or, entire subtrilobate 
Zz \eaves, pubescent under- 
neath; a native of Nootka 
Sound, and other parts of the 
north-west coast of North 
America. The wood isem- 
ployed for making wedges ; 
and the fruit is used as an 
article of food, under the 
hame of pow-itch, by the 
Chenook Indians. It flowers 
in April and May. It is 
much to be desired that this species of Pyrus were introduced into 
Britain ; since it seems the only one of the section which is indigenous 
to the western hemisphere. Judging from the engravings in Dr. Hooper’s 
work (from which our fig. 642. has been reduced to our usual scale of 
2in. to 1 ft., and fig. 643. has been copied of the natural size), it is a very 
handsome species. 

§ v. Eridlobus Dec. 
Sect. Char, Petals spreading, flat, with short claws, and with about 3 teeth at the tip. Styles 5, long 
at the base very hairy, and somewhat connected. Pome globose, glabrous, crowned with the lobes 
of the calyx, which are tomentose upon both surfaces. Leaves palmately lobed, glabrous. Flowers 
tipon unbranched pedicels, disposed in corymbs. (Dec. Prod., ii. p. 636.) 
¥ 25. P. rritoBa‘Ta Dec. The three-lobed-/eaved Pear Tree. 
Identification. Dec. Prod., 2. p. 636.; Don’s Mill, 2. p. 648. 
Synonyme. Crate*gus trilobata Labill. Dec., 4. p. 15. t. 10., Poir. Suppl., 1. p. 291. 
Engraving. Uabill. Dec., 4. t. 10. 
Spec. Char., &c. Leaves glabrous, palmately lobed ; the middle lobe 3-lobed ; the side lobes, in many 
instances, 2-lobed; the secondary lobes serrated. (Dec. Prod., ii. p. 636.) A tree, a native of 
Mount Lebanon ; growing to the height of 20 ft.; said to have been introduced in 1810; but of 
which we have not seen a plant. 
§ vi. Sdérbus Dec. 
Sect. Char., §c. Petals spreading, flat. Styles 2—5. Pome globose, or top- 
shaped. Leaves impari-pinnate, or pinnately cut. Flowers in branched 
corymbs. (Dec. Prod., li. p. 636.) Trees, growing to the height of from 
20 ft. to 40 ft. or upwards. Natives of Europe, North America, or the 
Himalayas. In this, as in the preceding section, there is a very great con- 
fusion of names. 
¥ 26. P. auRicuLA‘TA Dec. The auricled Service Tree. 
Identifications. Dec. Prod., 2. p.636.; Don’s Mill., 2. p. 648. 
Synonyme. Sorbus auriculata Pers. Syn., 2. p. 39. 
Spec. Char., &c. Leaves of 3 pairs of leaflets, and an odd one, hirsute beneath ; 2—4 of the lowest 
leaflets distinct, the rest connate with the odd one into an ovate one, which is crenate. Corymb 
compact. (Dec. Prod., ii. p.636.) A native of Egypt, and supposed by De Candolle to be only a 
variety of P. pinnatifida. It is said to have been introduced in 1800; but we have not seen the 
plant. 
¥ 27. P. piInNaTI’FIDA Hhrh. The pinnatifid-/eaved Service Tree. 
Identification. Ehbrh, Beitr., 6. p.93.; Smith in Eng. Bot., t.2331.; Dec. Prod., 2. p. 636. 
Synonymes. Sorbus hybrida Lin. Dec., 6.; Pyrus hybrida Smith Fl. Brit., not of Willd.; the 
Bastard Service Tree. 
Engravings. Eng. Bot., t. 2331. ; and our plate in Vol. II. 
Spec. Char., §c. Leaves pinnately cloven, or cut, or almost pinnate at the 
base. The petiole on the under side, and the peduncles, hoarily tomentose, 
3P 3 
