1928

ARBORETUM AND FRUTICETUM,

PART III.

are of a glaucous green, quite glabrous on both sides ; on rather longfootstalks, of an oblong oval form, with the indentations generally ter-minating in a short bristly spine. The flowers are generally producedtwo or three together at the extremity of the branches, on a peduncleabout 6 lines long. This oak is said to be a native of Portugal.

Q. calycina Poir. Diet. Encyc. Suppl., 2. p. 216., N. Du Ham. 7. p.

159., has oval-elliptic leaves, cottony and yellowish beneath. Nutsovate-oblong, in a long pubescent calyx. This oak, according to M.

Poiret, greatly resembles the ilex. It is of middling size, with nume-rous unequal branches, covered, when young, with an ash-coloureddown. The leaves are oval, and slightly pointed at the apex ; about1 in. long, entire, or slightly dentated with a few small teeth ; smoothand shining above, except when quite young; cottony and ratheryellowish beneath, with downy petioles. The acorns are oval, verylong, and borne on short, thick, axillary peduncles. The nut is en-veloped for three quarters of its length in a very deep pubescent calyx,often 8 or 9 lines long, covered with very closely set scales, and warty.

This tree is a native of France, having been found near Orange, inthe department of Vaucluse, by M. De Bressieux, who sent specimens of it to M. Poiret.

Q. expansa Poir. Diet. Encyc. Suppl., 2. p. 217., N. Du Ham., 7. p. 158., has the leaves oval, andslightly dentated; white and cottony beneath ; acorns oval on peduncles, with very large, pubescent,bell-shaped calyxes. This oak differs very slightly from Q,. calycina, and is a native of the samehabitat. It is about 12 ft. or 15 ft. high ; dividing into numerous branches, which are downy whenyoung. Its leaves closely resemble those of Q. calycina/ except in being rather shorter, and thattheir downy pubescence beneath is white, instead of being yellowish. The acorns are shorter, andthick; and the calyx is nearly flat, and bell-shaped. Poiret mentions two forms of this speciesdiffering slightly in the calyx.

Q. rotundifblia Lam. Diet., 1. p. 723., Willd. Sp. PI., 4. p. 434., N. Du Ham., 7. p. 158., Rees’sCyci., No. 37.; the round-leaved Spanish Oak; Chene k Feuilles rondes; has persistent leaves, whichare obovate-oblong, with spinous teeth, heart-shaped at the base, smoothish above, and downybeneath. This oak is very imperfectly known, as neither Lamarck nor Willdenow had seen eitherits flowers or fruit. The acorns are said to be sweet and eatable. It is a native of Spain, whence itwas brought to France; and there is a small plant in the Jardin des Plantes. In t|ie Nouveau DuHamel , it is said to be possibly a variety of /'lex; but Bose supposes it to be either closely alliedto, or identical with, Q. gramuntia. There are numerous plants of it, he says (writing in 1806), inthe Paris gardens.

Q. hhmilis Lam. Diet., 1. p. 719., Willd. Sp. PI., 4. p. 435., Ger. Emac., 1340., N. Du Ham., 7.p. 161., Rees’s Cycl., No. 38.; Q. p6dem vix sdperans Bauh. Pin., 420.; iibbur 7., sive Q. piunila,Clus. Hist. , 1. p. 19. j the dwarf Portuguese Oak ; Chene pygmee, Fr. ; has the leaves obovate, withspiny teeth at their apex, and rather heart-shaped at the base; downy beneath. Calyx of the fruitflattened. Nut oblong. This curious little shrub was found by Clusius, in barren sandy ground nearLisbon, very abundant. The whole plant is rarely more than 1ft. high when wild; thoughLamarck says that, by cultivation, it may be made to attain the height of 3 ft. or 4 ft. The leavesstrongly resemble those of the ilex. They are about 1 in. or 1J in. Jong, on very short footstalks ;smooth and sinning above, downy and hoary beneath ; the larger veins straight and parallel, andthe smaller ones reticulated. The acorns are sessile; the nut is oblong, and more bitter than thatof the common British oak, with a very shallow, and rather flattened, calyx. This is still commonin sandy soil in Portugal. The Q. hilmilis of the London gardens, noticed in p. 1924., is a verydifferent plant from that here described.

App. iii. African Oaks which have not yet been introduced.

Q. obtecta Poir. Diet. Encyc. Suppl., 2. p. 218., N. Du Ham., 7. p. 163., has the leaves nearly oval,slightly toothed, glabrous, shining. Acorns on peduncles, nearly solitary. Nut hidden in the cup.The branches of this species arc ash-coloured, glabrous, and extremely flexible. The leaves areentire, or bordered with a few spiny teeth. The cup only opens a little at the extremity, and isclosely imbricated; the upper scales being looser than the others, and somewhat recurved at thepoint.

App.

IV.

OaJcs of Asia Minor and Persia not yet introduced .

Q. cariensis Willd .;#1

Q.infectbria Oliv. Voy. dans 1’Emp. Ottom., 1. p. 253. 1.14,

15., Oliv. Trav., Eng ed. 2., p. 42. t. 14. and 15., N. Du Ham.,p. 162. t. 49. f. 1., Willd., No. 33., Rees’s Cycl., No. 40. ;

; Chene & Gallos, Fr .; Farber Eiche, Ger. ;

. andour/zgs.1819. and 1820.; the firstk. .Jl f i0m Olivier, and the second from

Du Hamel. Leaves ovate-oblong, Tvery, smooth on both sides, deeplytoothed, somewhat sinuat ed, decidu-ous. Fruit sessile; ripening thesecond year. Calyx tessellated. Nutelongated, nearly cylindrical. (Sm.

^nd Willd.) This oak, according toOlivier, seldom attains the heightof 6 ft.; and the stem is crooked,with the habit of a shrub, rather than that of a tree. Theleaves are about 1 in. or 1£ in. long, deciduous, bright green,smooth on both sides, but paler beneath ; their serratures aredeep and broad, not acutely pointed. Fruit solitary, nearly ses-sile. Cup slightly downy j its scales not very distinct. Acorn two or three times longer than thecup, smooth, nearly cylindrical. Olivier observes that this plant, besides producing the galls ofcommerce, bears a number of different kinds of this excrescence, which are neglected as useless.The tree, according to Bose, has been long in the Jardin des Flantes at Paris, where it bears thewinters quite well in the open air, losing its leaves in the autumn. He has no doubt that it maybe propagated in abundance in the south of France ; but considers it doubtful whether the insectcould be introduced and multiplied there with equal facility. According to the catalogues, this