1394 



POLYGONUM 



long, soft dull green, the blade ovaloblong, IK-2 times 

 as long as broad, shallow-cordate at base, scarcely 

 pointed, the prominent side veins uniting by the ends: 

 fls. greenish, in relatively small axillary clusters, the 

 akene trigonous. Island of Sachalin, north of Japan, in 

 Russian territory. B.M. 6540. R.H. 1876, p. 36; 1893, 

 pp. 394, 395; 1894, p. 55. Gn. 21, p. 280. G.C. II. 20:813 



POLYPODIUM 



P. compdctinn. Hook., 



mwh like P. Siol.r 



mall rigid 

 il). Tuber- 



'/ 



I88I. Sacaline— PolyEonum Sachalii 



■■(X%). 



andlll. 14:159 (in fr.). G.M. 31:170. V. 17:161. -Re- 

 cently introduced (in N.Amer. in 1894) for forage and 

 for ornament. It is inveterately persistent when once 

 established, and may easily become a pest. For forage 

 it has little merit where other things can be grown, for 

 it is too coarse. For planting in rough places, where a 

 thick cover is required, it is one of the best of all her- 

 baceous perennials. It is perfectly hardy in the North 

 and seems to thrive anywhere. P. SiehohJi was once 

 distributed as Sacaline, but that species is much 

 smaller, with smaller, shorter and square-based leaves, 

 and with more profuse bloom. 



.543; 



.iOl: 45, 



Hinl.llaya, up to 10.500 ft. 



.159. 



L. H. B. 



npd.ih 



POL'JMNIA (the muse Polyhymnia). 

 About 10 species of American composites, mostly c 

 viscid and heavy-scented, the North American species 

 being perennial herbs, the South American shrubby or 

 tree-like. They have loose panicles of yellow or whitish 

 fls. borne in sunmier. For further description, see 

 Gray's Manual, Britton aud Brown's Illustrated Flora, 

 etc. 



Canadensis, Linn. Canada or Small-flowered Leaf 

 Cup. Height 2-5 ft.: lv.s. deltoid-ovate to hastate, thin, 

 deeply angiilatc-loljed; lobes dentate, 4-10 in. long: 

 lieails few in terniiiinl clusters, 4-6 lines broad: rays 

 minute or none. .Iiiiic- Sept. Damp, rich, shaded places, 

 western Ont. to Minn., south N. C. to Ark. B.B. 2:405. 

 — Var. radiita, Gray, with whitish rays sometimes 

 '2 in. lung, is also offered by one dealer in native 

 plants. 



POLYPdDIUM (Greek, mnnii feet; alluding to the ex- 

 tensive rootstocks). PohjpotUitfctp. A genus of ferns 

 with naked rounded sori, and with the Ivs. jointed to 

 the rootstock.s, leaving a scar wlien they separate. As 

 here treated the veins may be free or united to form 

 areolin. The (;fnus is a very extensive one, growing in 

 all parts of tli.- world, and has frequently been divided 

 into a M lies of genera based on habit and the nature of 

 venalioii, wliirh is probably a more logical treatment; 

 some of these genera, indeed, as Phymatodes and Phle- 

 bodium, have been here separated; the genus would be 

 more homogenous were others placed by themselves. 

 For culture, see Fern. 



A. Veins free: Ivs. once pinnate. 

 B. .S'o;-! large, conspicuous. 



vulgare, Linn. Wall Pern. Polypody. Figs. 1881-3. 

 Lvs. 4-10 in. long, on pale stalks half their length, 1-3 in. 

 wide, cut nearly or quite to the rachis into entire or 

 slightly toothed blnnt pinna>. New Ent'land to Ala. and 

 westward to Ore.; also common throughout Europe, 

 where many forms are in cult. Var. Cimbricum (Fig. 

 1884) occurs in New York and New England. 



falcitum, Kellogg. Lvs. 12-15 in. long, 4-8 in. wide, 

 on long, straw-colored stalks; pinnjB numerous, taper- 

 ing to a slender point, sharply ser- 

 rate. Calif, to Wash 

 BB. Sori smallei It 1 eluitie, often 



Pltimula.HBK Lvs 9-18 m long 

 narrow lanceolate, 1-2 m wide 

 pinnae numerous, narrow, entne 

 blunt, the lower pairs scarceh 

 smaller than those above ; stalks 

 blackish. Fla. and trop. Amer. 



pectinitum, Linn. Lvs. elliptic- 

 lanceolate, 1-2'A ft. long, 2-6 in. 

 wide, cut to the rachis into horizon- 

 tal entire ortoothed pinn 

 ones gradually reducei 

 ■ • ■ Fla. 



AA. Veins uniting, forminf/ ref/ular areoJw each witJi <i 



single free inrliided rrinlet. 



c. lifs. simple, undivided. 



vacciniifdlium, Langs & Fisch. Lvs. of 2 sorts rising 



from slender, wide-creeping rootstocks ; sterile lvs. 



roundish or elliptic; sporophylls linear or ligulate, with 



large sori in a single row. Tropical Amer., from the 



West Indies southward. 



