POTENTILLA 



north temperate and frigid zones, and cbaracterized by 

 their compound leaves. 5 bracteoles borne at tbe base of 

 the 5 sepals, which in turn are borne upon the edge of 

 a cup-shaped, dry receptacle; stamens 10-30, together 

 with the 5 rounded petals inserted upon the margin of 

 the receptacle: pistils many, in fruit becoming minute 

 akenes; styles deciduous. Those in cultivation are all 

 hardy perennial plants suitable for border planting. 

 The most valuable double-fld. forms are hybrids. 



K. M. WlEGAND. 



The Amrrir,. r.. m., are generally rather un- 



riile, very i. n and do well with ordinary 



care. P. ^"'. ni'- and distinct low shrub, 



I)refers nioi-; i i r Aiil -ruw in even very 



dry soil. Win- " ' I in moist soil it 



is diftlcult t /' liould be given a 



and i^ 'I''''' !'■■<■ " /' '• .1 ••■-!• rn species 



with c-'i!,' n .!■ . ■■,■ I ic- '.•:■ I •. .>,.•,:,,: ._• ray color, 



is hai-i'' ' I- . - i . • ' ■.■ :,.:.■.- !i- liryish 



soil. /'- '.' ■■' " 1' .Hi ,iii(,iii,.i ...ijMiii species 



fori 



in opcTi or i.artially shaded po.sitiuus. Foleutillas are 

 |.rop. by division or seed, the hybrids only by division. 

 /'. fniiirnxii may be increased by greenwood cuttings. 

 F. W. Barclay. 

 Hybrid Potentillas have nearly all the good qualities 

 \vc look for in a border plant. — handsome foliage and 

 free-bloomiuEr habit. They continue in bloom from 

 spring until autiiK-r. altla.iiL-h iiiM-f i.v'.fii>-i!v in June 



and July. Tl :.-:im.i i- -■!-! i- ■-■ ,■.■!. ai.u l,ardy in 



tlie latitude .ii I; i ■ i, , \\ ,. -hington. 



They do not -i. ■ ■ . j ; ...a • , ; aa la.-.l stak- 

 ing. A heavy -.ii! -an - III' 111 In -i ('la hi .■ \ a i iaties are 

 propagated by division of tin- rootstock in spring; cut- 

 tings will not root. They run mostly in shades of 

 maroon, scarlet and orange, often beautifully banded 

 with yellow. They bear seed freely, and when carefully 

 hybridized we may get a very fine strain with a good 

 proportion of double ones. Seedlings bloom the second 

 year. Some of the species make neat rock plants, es- 

 pecially P. tridentdtd, P. verna and P. arr/entea.—the 

 last, though common, is valuable in places in which 

 other plants will not grow. t. D. Hatfield. 



Andre. Dr.. 10. 



•See I 



arKyrophylla. 8. granditlorit. 7. man 



atrosanguinea, 8. Hamlet, 10. pert'eeta. Iti. 



bicolor, 10. Hapwoodiana, 16. purpurea, 16. 



cardinale, 16. Hippiaiia. U. P.vren.-iic-a, V>. 



niccinea.9. hyhri.la, 10. Rolliiison, Wm.. 16. 



Daudin, 16. iiisiiiiiis. S. rupestris, 4. 



Eldorado, 16. /crain. .^.. Rnsselli.ina. 16. 



Emile, 16. laciniali, U. ,S;ilter, .Jeane. 16. 



fnrmosa, 9. laeiniosa, 1.!. Thurlieri, 10. 



fnitieosa. 1. Lemnine, 16. tridentata. 6. 



t'liindulosa. X Mars. 16. venia. 11. 



itlnirede Nancy, 16. Kepalensis, 9. versicolor, 16. 



Vesuve. 16. 

 A. Banal hares pinnate. 



B. Stem shrubbi/ l.fruticosa 



BB. Stem herbaceous. 



r. Lrs. silltn.tomentose beneath. 2. Hippiana 

 Cf. Lrs. green on both siiie.i. 



D. Lfts. large, 1 in. lonff, den- 

 tate .3. glandulosa 



i. rupestris 

 DD. Lfts. minute, ^-14 in. lonij, 



much di rifled '>. Gordoni 



AA. Basal Ivs. palinutelii S-7-toliolate. 

 B. Lfts. S. 



c. Fls. white (i. tridentata 



cc. Fla. yellow or red 7. grandiflora 



.H. argyrophylla 



iiB. Lfts. 5-7 9. Nepalensis 



c. Fls. red or purple 111. Thurberi 



cc. Fls. yellow. II. verna 



D. Lvs. green beneath 12. Pyrenaica 



i:t. laciniosa 



14. gracilis 



DD. Lvs. white beneath l.^j. argentea 



POTENTILLA 1421 



1. Iruticosa, Linn. Fig. 193"). Much-branched. 5 in. 

 to 4 ft. high, with peculiar shreddy bark; lvs. all pin- 

 nate; lfts. 3-7, small (6-12 lines long), oblong-linear, 

 acute, silky with revolute margins: fls. numerous, 

 bright yellow, showy, 8-16 lines broad; style lateral: 

 akenes, receptacle and disk all long-hairy. .Swamps and 



1935 Potentilla fruticosa ( 



2. Hippi&na, Lehm. Stem erect, stout, 1-2 ft. high, 

 silky, erect-branched above; stipules large, ovate- 

 lanceolate, subentire: basal lvs. rather large; lfts. 3-5 

 pairs, whitish silky above, tomentose beneath, decreas- 

 ing in size toward base of leaf, obovate-cuneate. 1-2^2 in. 

 long, obtusely toothed : cauline lvs. several and similar: 

 fls. deep yellow, ii-l in. broad, cymose; bracteoles 

 nearly equaling the calyx, .acute: petals slightly ex- 

 ceeding the sepals, rettisi-. W . -iian .Xnarica. 



3. glanduldsa, Lindl. S' ., i ■ i iij^.],. slender, 

 viscid and glandular-haif\ , i ' . il above: lvs. 

 mostly basal, 4-6 in. long: In :; I iian-. 1-1 1^ in. long, 

 obovate, obtusish, coarsely serrate-dentate, nearly gla- 

 brous; cauline lvs. 3-parted : fls. rather large, yellow 

 petals entire, equaling the long-acuminate sepals ; styles 

 thickened below, inserted at base of carpel: akenes 

 glabrous. Western U. S.; grows well in dry, sterile 

 ground. 



4. rupestris, Linn. Very similar to the last, slightly 

 stouter: fls. larger, nearly white; petals entire, much 

 exceeding the calyx. June, July. Eu. — Grows well in 

 dry, sterile soil. 



5. G6rdom, Baill. {Ivesia Girdoni, Torr. & Gray). 

 Root stout: caudex woody and cespitose: stems erect, 

 4-12 in. high, and, like the lvs., glandular - pubescent 

 or glabrous: lvs. mostly basal, numerous; lfts. 10-20 

 crowded pairs; cauline lvs. few, very small: fls. small 

 and inconspicuous in a crowded cyme; petals yellow, 

 spatulate, shorter than the sepals; stamens only'S: pis- 

 tils 1-5. Western V. S. ; forms dense mats in dry soil. 

 — Possibly generically distinct. 



6. trident&ta, Soland. Often woody at the base, 1-12 

 in. high, slender: branches erect-spreading, appressed- 

 pubescent: lvs. mostly basal, long-petioled; lfts. M-1 

 in. long, oblanceolate, truncate and 2-5-toothed at the 

 apex, cuneate and entire below, coriaceous, dark green, 

 paler beneath: fls. several, small, 3-5 lines broad, in a 

 terminal, nearly naked cyme; petals oval, entire, ex- 

 ceeding the calyx; style lateral, filiform: akenes and 

 receptacle villous. June, July. Northern N. Amer., 

 Greenland, Scotland.— Good for dry banks and rockeries. 



