2710 



PLATYCERIUM 



PLATYCODON 



P. grande). The fronds are said to be covered below 

 with a thin cottony down. 



DD. Segms. and sinuses narrow. 

 E. Unbranched portion of fertile Ivs. very long and narrow. 



Hfllii, Moore (P. alcicorne var. Hillii). Barren Ivs. 

 like P. alcicorne, but the fertile Ivs. are erect, the 

 unbranched portion longer, the forks more numerous 

 and compact, the segms. shorter and more acute. Lvs. 

 clustered thinly, covered when mature with white stel- 

 late hairs; sori in oval or roundish masses, not at the 

 base of the sinus but near the base of each of the last 

 segms. The upper third of the fertile If. is "15-18 in. 

 across, 3-parted, the central segms. with 1 or 2 side 

 lobes near the apex, the 2 lateral segms. broader and 

 twice or thrice forked into 5-10 ultimate lobes." T. 

 Moore. Queensland. G.C. II. 10:51, 428, 429. J.H. 

 111.32:497. 



EE. Unbranched portion of fertile Ivs. moderately long. 



alcicorne, Desv. Barren Ivs. rounded, convex, wavy 

 margined; fertile Ivs. clustered, attaining 2-3 ft., 2-3 

 times dichotomous, the unforked portion erect, the 

 segms. pendent, rather narrow and sharply cut, under 

 surface covered with thin cottony down: sori in irregu- 

 lar masses filling the last forks and a space across their 

 bases, shown in B.R. 262, 263 (as Acrostichum alci- 

 corne). Temp. Austral. A.G. 14:153; 15:111. Gn. 51, 

 p. 259. G.C. III. 10:697. Not Mn. 1, p. 77, which is 

 really P. grande. 



Var. majus, Moore, is stronger-growing, more 

 upright, and with thick, leathery, dark green Ivs. Ac- 

 cording to F. L. Atkins, the fertile Ivs. are more broadly 

 cut than the type and seldom forked more than once. 

 Polynesia. Veitch's Catalogue in 1873, p. 13. 



WILHELM MILLER. R. C. BENEDICT.! 



PLATYCLINIS (Greek, broad bed; in allusion to the 

 clinandrium). Orchidacese. Epiphytic orchids, suitable 

 for a warm greenhouse. These plants are by recent 

 orchid students referred to Dendrochilum. In this 

 account, the names under that genus are given in the 

 parentheses. 



Pseudobulbs small, closely crowded, each with a 

 single, narrow, evergreen If.: fls. borne in graceful, 



3065. Platyclinis giumacea. 



drooping racemes 6-10 in. long, small and not 

 showy, but the thread-like racemes arching from 

 among the densely tufted green foliage give the 

 plants a pleasing appearance; sepals and petals spread- 

 ing; labellum 3-lobed; column short, with an erect- 

 toothed clinandrium and a large, narrow, erect wing on 

 each side of the clinandrium. About 20 species in 

 India, China, and the Malay Isls. 

 The several species of Platyclinis are all small com- 



pact-growing plants, requiring but little root-space. 

 They are of easy culture and readily adapt themselves 

 to either pot or basket culture, the latter being prefer- 

 able for those with pendulous flower-scapes. The roots 

 do not like being disturbed, but when repotting is neces- 

 sary it is best to do it just after the flowering period. 

 The compost should consist of equal parts chopped live 

 sphagnum moss and clean peat fiber. The roots should 

 be carefully distributed and the compost pressed gently 

 but firmly in around them, leaving the surface slightly 

 convex when finished. At least two-thirds of the space 

 should be devoted to free drainage with potsherds or 

 bits of charcoal. A shaded location and moist atmo- 

 sphere, with a temperature of 60 to 65 F. by night and 

 70 to 75 by day, will afford them satisfactory growing 

 conditions. They require a liberal supply of water at 

 the roots, with occasional syringing overhead in bright 

 weather when growing, and should never be allowed to 

 remain long dry even when at rest. The plants fre- 

 quently produce side growths from the old pseudobulbs, 

 which may be removed after the growths are matured, 

 leaving three or more of the old pseudobulbs attached 

 to each piece, thus increasing the stock. When no nat- 

 ural break occurs, however, the plants may often be 

 induced to break by slightly twisting, or notching the 

 rhizome with a sharp knife, thereby retarding the flow 

 of sap at that point. (Robert M. Grey.) 



giumacea, Benth. (Dendrochilum glumaceum, Lindl.). 

 Fig. 3065. Pseudobulbs crowded, forming dense spread- 

 ing masses, the young ones clothed with red scales: Ivs. 

 solitary, broadly lanceolate, tapering to a petiole which 

 is inclosed by the sheath: peduncle from the top of the 

 pseudobulb, slender, bearing a long drooping spike of 

 small white fls.; sepals and petals spreading, oblong, 

 acuminate; middle lobe of the labellum rotund, curved, 

 base with 2 fleshy ridges. Spring. Philippines. B.M. 

 4853. G.C. III. 18:552. G.M. 48:385. Gn.W. 16:665. 



filif6rmis, Benth. (Dendrochilum filiforme, Lindl.). 

 Pseudobulbs crowded: Ivs. linear-lanceolate: fl.-st. 

 thread-like, bearing a long, pendulous raceme of small, 

 pale yellow fls.; sepals and petals obovate; labellum 

 cuneate-rotund, auriculate at the base. Summer. 

 Philippines. I.H. 25 : 323 (as Dendrochilum glumaceum) . 

 G.F. 2:485. 



Cobbiana, Hemsl. (Dendrochilum Cobbia- 

 num, Reichb. f.). Lvs. oblong-lanceolate: fls. 

 in a zigzag raceme, pale yellow, with an 

 orange lip; sepals and petals triangular- 

 oblong; labellum cuneate-fan-shaped, retuse. 

 Nov., Dec. Philippines. O. 1914, p. 123 

 This is offered hi some catalogues under the 

 name of P. autumnalis. 



P. bdrbifrons, Kranzl. Lvs. lanceolate, acute, 5-7 in. 

 long, about 1 in. broad: racemes very slender, pendu- 

 lous, many-fld. ; fls. greenish white, about rein, across; 

 sepals and petals similar, ovate-lanceolate, acuminate; 

 lip entire, obovate, apiculate. Sumatra. G.C. III. 31: 

 366 (desc.). P. cucumerinum, Hort. (Dendrochilum 

 cucumerinum, Reichb. f.). Lvs. long-petiolate, oblong, 

 5-nerved, up to 5 in. long, less than J^in. wide: scape 

 slender, exceeding Ivs., with a pendulous raceme; fls. 

 pellucid-green; sepals oblong, acute, /^in. long; petals 

 similar, denticulate, lip 3-toothed. Philippines. P. lati- 

 fdlia, Hemsl. Pseudobulbs 1-lvd.: Ivs. elliptic-lanceo- 

 late, lOin. long, 7-nerved: raceme many-fld., pendulous, 

 on an erect scape; fls. greenish yellow; sepals triangu- 

 lar-lanceolate, acute, %in. long; petals ovate-lanceo- 

 late, acute, denticulate; lip brown-striped. Philippines. 



GEOKGE V. NASH. 



PLATYCODON (Greek, platys, broad, and kodon, 

 bell; referring to the shape of the flower). Campanula- 

 cese. Perennial smooth erect glaucous herbs, which are 

 used in border planting. 



Leaves sparse, often opposite or whorled, subsessile, 

 dentate: fls. large, solitary or few at the ends of the 

 branches; calyx-tube adnate, turbinate, 5-lobed; 

 corolla campanulate, 5-lobed; stamens free from the 

 corolla; ovary inferior, 5-celled: caps, obovoid, top 



