An Encyclopedia of Horticulture. 



245 



Fteris — continued. 

 P. semipinnata (halt-pinnate). 



dti. 1ft. or more lonfi, strong, 

 erect, l)rii;ht chestnnt-brown. fronds 1ft. to lift, lonji, 6in. to 

 9in. liroail, ovate - lanceolate ; upper jiart cut nearly to the 

 rachis into numerous close, entire, linear lobes, the lowest of 

 which are IJin. to 3in. long ; lower two-thinls of the fronil with 

 six or eight pairs of opposite, disUintly-placeil pinna?, the larijest 

 of which are Sin. to bin. lonj;, with a long, linear, entire point, 

 anil a broad, entire wing on the upper side of the rachis, bnt the 

 lower side with several linear pinnules, lin. to 2in. long. Invo- 

 lucres membranous. East Indies, iSc. See Fig. 314. (H. «-i. F. 59.) 



P. serrnlata(saw-edRe(i).* Spider Fern. sti. 6in. to 9in. long, 

 erect, wiry, pale or brownish, frondis Sin. to 18in. long, 6in. to 

 9in. broad, ovate, bipinnatifid ; main rachis margined with a 

 wing, which gradually narrows downwards ; pinna; in six or 

 more distant, opposite pairs, the upper ones simple, often tin. to 

 6in. long, Jin. to Jin. broad, the lower ones with several long- 

 linear, erecto-patent pinnules on each side, the edges of the 

 barren ones spinulose-serndate. Involucres narrow-membranous, 

 (.'hina. 1770 Greenhouse. The following varieties of this species 

 are enumerated by Mr. B. S. Williams : 



P. s. angustata (narrow). An elegant form, with pinna; very 

 much narrower than in the type, and crested at each point. 



P. s. Applebyana (Appleby's). A superb garden variety ; pinna; 

 long and narrow, pendent, furnished witli a much-divided and 

 fringed tassel at all the points. 



P s. corymbifera (corymb-bearing). This handsome variety is 

 also of garden origin. It has erect fronds, with much-shortened 

 pinna, forming dense, crisp, corymbiferous heads. 



P. s, crlstata (crested). An erect garden form, with the apex of 

 each pinna beautifully crested. 



P. s. C. semi-fastlgiata (slightly fastigiate). The finest variety 

 of all ; it has a compact, dense haliit, and forms a very large and 

 broad-crested corymb at the apex ; the lower portion of the frond 

 is developed as in the normal form. 



P. s. polydactyla (many-fingered). In this variety, the points 

 of the pinna; are several times forked or fingered, and fre- 

 quently much lengthened out. 



Fig. 315. Pteris serri'Lata texuifolia, showing Habit and 

 Portion of detached Frond. 



P. S* tenulfolia (slender-fronded). A form with narrow pinna;. 



See Fig. 315. 



P. spinulifera (spine-bearing). A synonym of P. ab-ovirens. 



P, Stelleri (Steller's). A synonym of I'cUma (jracUis. 



P straxninea (straw-coloured), sti. 1ft. to l^ft. long, and, as well 

 as the rachis, stramineous, fronds narrow-'deltoid, 1ft. to lift. 

 long ; pinna; .ascending, the lowest much the largest, deltoid, with 

 compound lower pinnules on both sides, the others lanceolate, 

 liin. to 2in. broad, cut down to the rachis or a narrow wing ; 

 segments lanceolate, narrowed to a point, the sterile ones sharply 

 and closely dentate, upper ones growing gradually shorter, sori 

 falling short of the tips of the segments. Chili. SVN. /'. crispa 

 (of gardens). 



P. sulcata (furrowed). A form of P. ijuadriaurita. 



P, trexnula (trembling).* sti. 1ft. or more lon^, strong, erect, 

 bright chestnut-brown, fronds 2ft. to 4ft. long, 6in. to 2ft. broad, 

 the apex with a few, closely-placed, linear, entire lobes, which are 

 obliquely decurrent at tlie base, the largest hardly more than lin. 

 long ; upper pinna; simply pinnate, with numerous similar lobes 

 on both sides, the largest about 6in. long, above lin. broad ; 

 lower pinnne often very compound, sometimes 1ft. long and 

 bipinnate. sori copious, sometimes filling up the whole segment 



Fteris — continued. 



except the midrib. Australia and New Zealand, 1820. (!reen- 

 house. See Fig. 316. (H. S. F. 120li.) The variety Kiihiinna 

 has its ultimate segments large, sometimes IJin. long, nearly 

 jin. broad, not toothed. 



P. tricolor (three-coloured). A synonym of P. aspcricaulis 

 tricolor. 



P. tripartita var. (thrice-parted). A syiu^uym of P. Milncana 



Fig. 316. Pinna of Pteris tremuli. 



P, umbrosa (shady).* sti. 1ft. to lift, long, erect, bright reddish- 

 brown, fronds 1ft. to 2ft. long, 6in. to 12in. broad, with a 

 terminal pinna and usually six to nine lateral ones, all of which 

 run down the stipe jit the base, so as to form a broad wing, which 

 reaches nearly or quite to the next node : upper pinnie 3in. to 

 6in. long, iin. to Ain. broad, finely serrated in the sterile portions ; 

 lower ones forked, or with two or four erecto-patent, linear 

 pinnules. Australia, 1823. (ireenhouse. (H. S. F. 130b.) 



P. undulata (waved). A variety of P. cojnans. 



P, Vespertilionis (bat-winged). A synonym of P. incisa. 



P. vittata (strijted). A variety of /'. fjrandifoUa. 

 FTERIUM. A synonym of Lamarckia. 



FTEBOCAKiFUS (from pteron, a wing, and karpos, 

 a fruit; the pods are girded by a broad wing). Obd. 

 Leguminosw. A genus comprising about fifteen species 

 of unarmed, stove trees, inhabiting- the tropical parts 

 of Asia, Africa, and America. Flowers yellow, rarely 

 mixed with violet and white, often showy, disposed in 

 simple or paniculate, loose, axillary or terminal racemes ; 

 calyx turbinate at base ; standard orbicular or broadly 

 ovate ; wings oblique, obovate or oblong ; petals glabrous. 

 Pods compressed, indehiscent, orbiculate or ovate, rarely 

 oval-oblong. Leaves alternate, impari-pinnate ; leaflets 

 alternate or irregularly opposite, exstipellato. For culture 

 of the under-mentioned species, see Dalberg'ia. 

 P. dalbergioldes (Dalbergia-like). A synonym of P. indicus. 

 P, Draco (dragon). Dragon (Jum-tree. ft yellow, in paniculate 



racemes ; panicles short, loose. May. Pods lAin. in diameter. 



I., leaflets 2in. to 4in. long, ovate or oblong, .acuminate, shining. 



h. 30ft. Tropical America, 1820. 



