1422 I'OTENTILLA 



7. grandinora.LiiiD. Stem leafy. JO-20 in. bigb, erect, 

 branclied, rilloue: caudex nearly simple: Ivif. with 

 appresB€9d-bairy petioles txcetitiing the broadly uborate- 

 coneifonu, denttite, l-ll4-ui. louglfts., wliieb'are gnen 

 and pilose-silky on tjotb Bides: fls. numerous, ^-% in. 

 in diam. ; petals broad, emarKihate, much exceeding; the 

 acute sepals; akenes glabrous, rugulose: receptacle 

 bairy. June, July. Eu., North Asia. — A good border 

 plant. Differs from the next in the smaller, broader 

 leaflets, green beneath, and the rugulose cari>els. 



8. argyrophyUa, Wall. (P. intUjnh, Royle). Tall and 

 leafy, 2-3 ft. high, stout, silky-hairj- or pubescent: Ivs. 

 large, loug-petioled; Ifts. 2-3 in. long, elliptic-ovat*- or 

 obovate, acut«ly toothed, white beneath, silky-hairy, 

 rarely glabrous above: fls. yellow, %-1'A in.' broad, 

 long, slender - pedjcelled ; sepals acuminate; petals 

 large, obcordate, exceeding the calyx: akenes smooth; 

 style sub-t-erminal, receptacle villous. June, July. 

 Himalayas. Var. atrOBangtunea, Hooker i P. atroxaii- 

 guinea, Lodd.). — Fls. red or purple, same range. One 

 of the most common species in cultivation and exten- 

 sively hybridized with /•". AfpalenjiiK, giving rise to 

 most of the hybrid l'ot«ntillas of the trade. 



9. Hepalensis, Hook. (P. formdea, Don. P. eoecinta, 

 Hoffm.). Erect, V/^-'l ft. high, from a woody rootstock. 

 few-fld., clothed with long, soft, spreading hairs, leafy- 

 branched: lower Ivs. 5-7-foliate, often 12 in. long; Ift's. 

 ( 2-3 in. long) obovate or elliptic-obovate, acut« or obtuse, 

 coarsely serrate, green, base entire: fls. 8-12 lines broad, 

 purple; petals obcordate, twice the length of the acute 

 sepals; bract«oles obtuse: akenes minute, glabrous, 

 wrinkled; receptacle hairy. May, June. Himalayas. 

 —A fine species. 



10. Thflrberl, Gray. Similar to the last, but stem 

 ascending, more slender and finely pubescent: Ivs. 

 little paler beneath. 1-2 in. long, coarsely toothed or 

 almost crenate, thinner, smaller and less veiny: brac- 

 teoles lanceoUite, acute. June, August. Southwestern 

 U. S.— Good for border planting. 



11. Tima, Linn. Stems 4-10 in. long, spreading or 

 procumbent, sometimes creeping, forming a thick 

 turf, much branched from the base, more or less hispid : 

 radical Ivs. small; Ifts. .".-7. l,riiM<ilv nimvate-cuneiforra, 

 dentate, 4-0 lines long: ni |.r !,■ -• -il.-. temate: fls. 

 many, of medium size. ..f ' , , - petals obeor- 

 date, little exceeding tii' • • oli-s similar to 

 the sepals; akenes sni'..ii ; ,• • ..|,ta. I- hMry. April, 

 .May. Dry or stony places, Europe. — For banks and 

 rockeries. 



12. FyTeil&lca, Ram. Stem branched below, G-I5 in. 

 long, decumbent at base, then ascending: radical Ivs. 

 long-petioled, hirsute or nearly glabrous; Ifts. oblong, 

 toothed above with subacute teeth, terminal tooth of 

 e([ualsize; etem-lvs. few, similar: Ivs. numerous: sepals 

 and bracteoles similar, acutisb; petals longer than the 

 calyx, obcordate: carpels smooth; receptacle hairy. 

 Aug. Europe.— Larger than the last and less prostrate: 

 Ifts. larger, more oblong: fls. larger. 



13. laciniosa, Wald. & Kit. (P. laciniata, Amer. 

 Hort. ?). Erect and fonning clumps 1-2 ft. high, spar- 

 ingly hirsute, reddish: Ivs. with 5-8 broadly oblanceo- 

 late-oblong, 2-3-in. long, deeply laciniate-pinnatifid and 

 pilose Ifts. : fls. in mucb-branciied cymes ; sepals lanceo- 

 late; petals bright yellow, emarginate, much longer than 

 the calyx: akenes rugose; style terminal. Hungary; 

 grows well in dry ground. -Closely related to P. recta. 

 Differs from the two preceding in the larger size, stiff, 

 erect habit, larger Ivs. and rugose akenes. 



14. gr4cilis, Dougl. Erect and rather tall (about 2 ft. 

 high), more or less whitened with silky hairs and to- 

 mentum: basal lv«. long-petioled; Ifts. obovate or 

 oblanceolate, 1-2 in. long, deeply and regularly inciscd- 

 dcntate, silky above, rarely glabrous, white-tomentose 

 beneath; stem-lvs. similar but smaller: fls. many in a 

 terminal cyme; corolla 6-9 lines broad, showy; petals 

 obcordate, exceeding the acuminate sepals: carpels 

 glabrous. Western N. Amer.- .Some specimens in cult, 

 may be P. JSlaschkecina, Turc. 



15. argtet«a, Linn. Ascending orprocumbent, tufted, 

 branched from the base, 4-12 in. long, more or less 

 white-tonientose, leafy: Ifts. (>-12 lines long, obovale- 



I'OTHOS 



oblanceolate. cuneate, deeply incised with narrow tetth 

 and revolute margins, dark green above, white beneaili : 

 fls. few, cymose. 2-4 lines broad: sepals ovate-acuti-. 

 slightly shorter than the rounded petals: stvles filiform, 

 terminal: akenes glabrous. JIay-.Sept. Dr.v, sterile soil 

 throughout the whole north temperate zone. 



IC. Hybrid Potentillas, originally from P. argyro- 

 phylla, var. alrosaiujiiiitea and P. .Vepalentis (see 

 Gn. 16:207): Single-flouered. -Hapvoudiana, Ifts. 5-6, 

 petals at base deep rose, at center pale rose, margins 

 whitish; Kusselliana. scarlet-fire- red, large: Ifts. 3. 

 Double floirered. — BicoloT Plena, orange and vermilion: 

 Cardinale, brilliant cardinal; Dr. Andri, golden yel- 

 low, suffused with vermilion; Eldorado, purple suf- 

 fused with yellow; Emile, bright bronzy red; Gloire 

 de Nancy, golden yellow: Hamlet, dark carmine: 

 Hybrida. name applied to various hybrids, R. H. 1890. p. 

 305; Jeane Salter, orange shaded scarlet; Le Vesuve. 

 rtoriferons, light red margined with yellow or .scarlet: 

 Mars, dark velvety red: )l. Daudin, beautiful amber; 

 OBriana, pink and salmon: Perfecta, maroon shaded 

 lemon; Purpurea, deep purple; Purpurea lutea plena, 

 dark purple, double; Versicolor, carmine an<i yellow- 

 flaked; Victor Lemoine, light red striped with yellow; 

 Wm. Rolliuson, mahogany brown suffused with orange. 

 P. aruerina. Linn. Sjl\-eb-Wee». Spreading by runners, 

 low, white-tomentose: Ivs. radical, pinnate: fls. yellow. 

 Gravelly lake shores. Very de<-orative. En„ X. Amer.—/*. 

 Cajtad^ruis, lAuo, Prostrateorcreeping: Ivs. green, pahnately 

 3-5-foUolate: fls. few. yellow. X. Amer. Good for dry. sterile 

 soiL Mn. 3:38.— f. UUUri. Hort. A trade name not deter- 

 mined. Woolson says. "Colorado; 12-18 in. high. Plantdensely 



foliage: fls. deep yellow, worthy of cult. 

 Ea.— P. SaUtmiana. See B.M. 7238.— P. nulphttrra. Lam. 

 Similar to P. recta, but fls. pale yellow and larger. Fine deco- 

 rative plant. Eu.. introduced in Amer. g^ jj^ WiEGAND 



POTfiBIUM (Greek for drinking cup: because the 

 foliage of one species was used in the preparation of a 

 medicinal drink). liosdcew. Linnaeus placed certain 

 rosaceous plants in the genera Poterium and San- 

 guisorba, the latter having precedence of publication. 

 Many subsequent authors have united these genera, ami 

 thev are so treated in Grav's Manual. Focke, however 

 (Eiigler and Prantl, Die Naturlichen Pflanzenfamilien). 

 re-deflnes the genus Poterium to include one species, 

 the P. epinosum of .South Europe, allowing the other 

 species to remain in Sanguisorba. As thus understood. 

 Poterium is mona'cious, the lower fls. in the spike 

 staminate, the upper pistillate, the stamens many and 

 hanging, the styles 2, the fr. somewhat fleshy, colored, 

 and inclosed in the calyx, the leaves pinnate. P. spindsnm, 

 Linn., is a small spiny shrub with nearly glabrous 

 serrate leaflets, somewhat downy branches, small green- 

 ish fls. in oblong spikes and reddish berry-like fr. It is 

 offered in S. Calif. Grows 3 ft., the branehlets ending 

 in spines. Said to be a very interesting ornamental 

 under-shrub. 



For P. Canadense and P. Sanguisorba, see Sanguis- 

 »»■*"• L. H. B. 



FOTHOS (Pothu is said to be a Ceylonesc name). 

 Araceue. Between 30 and 40 tall-climbing branching 

 shrubs (more or less herbaceous as known in cultiva- 

 tion) of the oriental tropics; leaves thick and often 

 shining, entire or lobed, sometimes blotched or varie- 

 gated. The species are warmhouse foliage plants, re- 

 quiring the same general treatment as Pbilodendron 

 (which see). Five names are in the American trade, 

 but not all of them belong to Potlios. In fact, the genus 

 Pothos is very ill-defined in cultivation because species 

 are named before flowers and fruits are known and 

 determinations arc often wrongly made. Some of them 

 are to he referred to Scindapsus and others perhaps to 

 Rbapbidophora. The fls. are small and perfect, crowded 

 on a spadix, with 6 perianth-segments and G stamens, 

 the ovary If-loculed and with a rounded or mushroom- 

 like sessile stigma: fr. a 1-3-seeded berry: spatho 

 usually persistent and wide-spreading or dcflexed at 

 maturity. Rhaphidophora has an oblong or linear si igma. 

 The species of Pothos send out cord-like roots tliat ding 

 to damp walls. For P.argyrma, see ScindapKun piftns, 

 var. For monograph, sec Engler, DC. Monogr. I'ljaner. 2. 



