734 JUGLANDACE^. (WAL^UT FAMILY), 



late fioicers : limb of perigoniiim hyaline ; style deciduous with limb of 

 perigonium after flowering; j)ei'icarp of nutlet thickish, beset with little 

 warts containing needle-like crystals, and between the w^^rts longi- 

 tudinal, naked lines — Annual herbs, with hyaline stipules. 



C. prostrata, Grortn. ,1 to .3. Leaves petioled, ovate- 

 rhombic, .01 to .03 long, scabrous-margined, the lowest opposite, the 

 upper, on account of the small size or abortion of their opposites, 

 alternate; stipules entire or dentate, those of opposite leaves connate, 

 of the others clasping. Flowers minute, sessile, green ; the staminatc 

 twin, toward tip of branches, opposite the alternate leaves, naked ; the 

 pistillate at axils of leaves, especially of the opposite ones, three or less 

 in a cluster, bracted —May and June — Common. 



Order XCVII. PL.ATA]VACE^, Lindl. (Plane Tree FxVmily). 



Trees with vKitery juice, alternate^ iKtlmately lobed 

 leaves, slieathing zti]}ules, and monoBcious flowers in sejxtrate 

 and naked sphencal heads, destitute of calyx and corolla ; 

 the fruit cliib-shaped^ 1-seeded nutlets, fur nished vnth hristly 

 dovm along the lase — PerigoTiium reduced to minute, liairy 

 scales, often 0. An order witli only one genus. 



PJLATAiVrS, Tourn.' Plane Tree. Buttonwoou. Dili. 



Staminate fioiocrs of numerous stamens, with club-shaped, little 

 scales intermixed ; filaments short, anthers 2-celled, oblong, with a 

 truncate-peltate connective, ristillate Jioicers, consisting of obconical, 

 1-celled ovaries, hairy at base, ending in an elongated-subulate style, 

 stigmatic at apex, these flowers intermixed with club-shaped scales. 

 Nutlets coriaceous, small, tawny-hairy below, containing a single, 

 orthotropous, pendulous seed. Embryo straight in axis of thin albu- 

 men or albumen — Trees; peduncles terminal on twigs, the leaves of 

 which are not yet developed, elongated, pendulous, mouiliform, bear- 

 ing 3-7, subsessile heads. 



P. Orieiitalis, L. 5 Oriental Plane Tree. Dilh. 20 or tnore, 

 bark scaling ofE in sheets. Leaves woolly beneath then glabrescent, 

 cuneate or truncate or subcordate at base, more or less deeply 3-5-cleft 

 into lanceolate, lobed or dentate segments — Early spring — By water, 

 usually fountains or torrents or rivers, from cl-Ghor to subalpine 

 regions. 



Order XCVIL JUGf^A\J>ACE.«, Lindl. (Walnut Family). 



Trees %inth alternate, ])innate leaves, and no stipules ; 

 flowers moncecious, the staminate in cathins (aments) loith 

 an irregular per iejonium adnate to the hrctct ; the pistillate 

 solitary or in a small cluster or spihe, with a regular, 3-5- 

 lobed p)erigonium, adherent to the incomp)letely 2A'Celled, 1- 

 ovuled ovary. Fruit a dry drupe, vnth a crustaceous or 

 hony nut-shell, containing a large, ^-lohed, orthotropous 

 seed— Albumen 0. Cotyledons fleshy, crum]3led, oily, 2-lobed ; 



