An Encyclopedia of Horticulture. 



247 



tontinwed. 



Pterostylis- 



ciirved, and very concave ; petals lanceolate-falcate, 

 curve. I under the dorsal sepal, and forming with it an 

 arched or almost hood-shaped upper lip or helmet; 

 lateral sepals more or less united in a two-lobed lower 

 lip, the lobes often terminating in long points ; lip on 

 a short claw at the end of the basal projection of the 

 column : column elongated within the galea, and curved 

 with it. Radical leaves ovate, tnfted ; cauline ones 

 linear or lanceolate, or reduced to sheathing scales. 

 The under-mentioned species, which are those best 

 known to gardeners, thrive in leaf mould, lightened by 

 the admixture of a little sand. Before putting in the 

 soil, the pots should be one-third filled with broken 

 crocks. Propagated by divisions. Except where other- 

 wise stated, all the species here described are Aus- 

 tralian. 



P. acuminata (taper-pointed), fl. green ; galea lin. to IJin. long, 

 usually pioiluceil into a point ; lip oblong-linear, tapering to a 

 point : scape one-flowered, bin. to Sin. high. April. I. in a 

 radical rosette, ovate or broadly elliptical, and five or seven- 

 nevved. h. 6m. 1827. (B. JI. 3401; K. A. O., Part 5.) 

 P. Banksil (Banks'). Jl. green, solitary, 2in. to 3in. long ; upper 

 sepal arched forward, the lateral ones produced into long, 

 slender tails ; lip linear, the tip exserted. April. (. numerous, 

 alternate, sheathing the whole stem, rising above the flower, 

 narrow linear-lanceolate, acuminate, h. bin. to 18in. New Zea- 

 land, 1832. (B, M. 3172.) 

 P. Baptistii (Baptist's).* iL green, marked with white and 

 brown, solitary, and adorned with two bristle-like antennae. 

 Winter. ;. rosulate, basilar, petiolate, oblong-cuneate, the 

 upper ones ascending the rachis. h. 1ft. 1877. (B. M. 6351 ; 

 G. C. u. s., ix. 213.) 

 P. carta (short-lipped). /. green; galea erect, about IJin. long, 

 acute, but not acuminate, the lower lip cuneate, with two 

 broadly-lanceolate lobes ; lip linear, rather_ longer than the 

 column ; scapes one-flowered, usually about 6in. high. October. 

 I. in a radical rosette, usually on long petioles, ovate or broadly 

 elliptical, five to nine-nerved, from under lin. to IJin. long. 

 1829. (B. M..3086; F. A. O., P.art 5.) 

 P. nutans (nodding). Jl. green ; galea nearly lin. long, much 

 curved near the base, and again towards the end, so as to give the 

 flower a nodding appearance, the lower lip shortly and broadly 

 cuneate ; lip oblong-linear, obtuse, sometimes minutely ciliated ; 

 scape one-flowered, 6in. to 12in. high. September. (. in a 

 radical rosette, petiolate, ovate or elliptical, iin. to lAin. long. 

 1826. (B. M. 3085.) 



PTEROSTTBAX. A synonym of Halesia (which 

 see). 



FTEBOTA. A synonym of Zanthoxylum (which 

 see). 



FTHBOZONIUM. Included under Gijmiiogramme. 

 FTEBYGOCALTX. A synonym of Crairjm-dia. 

 FTEBTGODIUBI (from ptenjriodes, wing-like ; 

 alluding to the appearance of the sepals). Monk's-oowl 

 Orchid. Obd. Orchidece. A genus comprising about half- 

 a-score species of greenhouse, leafy, terrestrial, South 

 African orchids. Flowers spicate, few or solitary ; 

 dorsal sepal connivent with the petals, and more or less 

 coherent ; lip adnate to the base of the column, and fur- 

 nished with a large, tongue-formed appendage at its base. 

 Probably none of the species are now in cultivation. 



FTILOCNEMA. A synonym of Pholidota (which 

 see). 



FTIIiOMEBIS (from ptilon, a feather, and meris, a 

 part ; alluding to the fringed, chaffy scales of some of 

 the species). Stn. Hijmeufj.vys. Ord. Compnsit(B. A 

 small genus (abotrt three species) of hardy, annual, Cali- 

 fornian herbs, regarded, by Bentham and Hooker, as 

 synonymous with Actinolepis. Flower-heads yellow, pe- 

 dunculate at the tips of the branches ; ray florets in one 

 series, ligulate, two or three-toothed ; involucral bracts 

 one-seriate ; receptacle convex or conical, naked or very 

 slightly bristly ; achenes linear. Leaves opposite, or the 

 upper ones rarely nearly all opposite, remotely toothed, 

 incised, or once or twice pinnatifid. P. coronaria, the 

 only species calling for mention here, may be treated as 

 other hardy annuals. 



Ftilomeris — contmued. 

 P. coronaria (crowned). Ji.-lieatls. ray florets oblong ; involucral 

 scales lanceolate ; receptacle pilose. June. I. mostly opposite, 

 the divisions capillary, h. 1ft. 1838. Plant branched from the 

 base minutely puberulent. SvN. Uymenoxys californka (B. M. 

 3828). 



PTILOTRICHUM. Included under Alyssum. 

 FTYCHOSPERMA (from pfyclie, a fold or wind- 

 ing, and sperma, a seed; referring to the ruminated 

 albumen). Australian Feather-palm. Syn. Senforthia. 

 Ord. Pahme. A genus of elegant, unarmed, stove palms, 

 usually with tall trunks. About a dozen species have 

 been enumerated, natives of tropical Australia, New 

 Guinea, and the Pacific Islands. Flowers usually rather 

 small ; complete spathes two, caducous ; spadix with 

 spreading, often slender, branches. Fruit ovoid or ellip- 

 soid, sometimes beaked, terete or sulcate, one-seeded, 

 the albumen more or less ruminated. Leaves terminal, 

 equally pinnatisect ; segments thickened on the margins, 

 prsmorse, the terminal one confluent ; sheaths elongated. 

 The species thrive best in fibrous loam, leaf mould, and 

 sand. Thorough drainage, and an abundant supply of 

 water, are important points in their culture. Propagated 

 by seeds. 



P. Alexandras (Alexandra's). I. pinnate, beautifully arched, 

 quite red when young, but light green when mature; rachis 

 smooth. Stems father slender, h. 70ft. to 80ft. Queensland, 

 1870. A very elegant species, rare in cultivation. (F. d. S. 1915.) 

 Archontophofnix Alexaiulra; is now the proper name of this 

 plant. 



Fig. 317. Ptvchospkrma (.:i'nningimmiana. 



P. Cunningtaamlana (Cunningham's).' lUawarra Palm I. 2ft. 

 to 10ft. long; piuure lanceol.ate, narrow, unequally bifld at the 



