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REVISION OF THE GENUS SANGDISORBA. 203<br />

Subgen. I. Sanguisorba, L.—Flores omnes herraaphroditi (rarius<br />

polygarai, supremis mere femineis), aut omnes tetrandri, aiit omnes<br />

dodecandri, plerumque monogyni. Stigma muricato-papillosum. Calycis<br />

tubus fructifer siccus, quadrangularis vel quadrialatus, Isevis. Vege-<br />

tatio iu omnibus lateralis, surculis floriferis e folioriim radicalium axillis<br />

prodeiintibus.<br />

Sect. 1. ErsANGTJisOEBA, De Cesati, Iconogr. PI. It. ii.—Stamina 4, carpidium<br />

1, calyx fructiferus quadrangularis vel anguste quadrialatus.<br />

A. Florescentia adscendens {centripeta).<br />

1. ;S'. Canadensis, L., cum varietate SitcJierisi (JaUfolia), et (?) S.<br />

media, L.<br />

2. S. alpina, Bunge.<br />

B. Florescentia descendens (centrifuga).<br />

3. S. officinalis, L. (cajus varietates esse videutur : S. moniana<br />

et serolina, Jordan, nee non S. auriculata, Scop., cui flores polygami<br />

adscribuntur).<br />

4. S. tennifolia, Fiscli., cum formis affinibus non satis extricatis<br />

8. caniea, Fiseh. ; S. rubra, Schrauk; S. aitgustifolia, Fisch. ; S. longi-<br />

folia, Bertol.<br />

5. S. polygama, Nyland. (Au a S. officinali satis distincta?)<br />

Sect. 2. PTEEACHENinr, De Cesati, 1. c.—Stamina 6-15 (saepissime 10-12)<br />

carpidia 1-2 ; calycis tubus latissime alatiis ; florescentia e regione media<br />

adscendens simul et descendens.<br />

6. S. dodecandra, Moretti.<br />

Subgeu. II. PoTERiDiUM, SpacJi.—Flores omnes hermapliroditi,<br />

diandri vel tetrandri, monogyni. Stigma breviter penicillatum. Calycis<br />

tubus fructifer induratus, quadrialatus, reticulatim et transverse ru-<br />

ffosus. Yesetatio terniinalis. Florescentia adscendens.<br />

7. S. myriopliylla (Rchb. Herb.), A. Br. et Bouche.<br />

'' Foterimn myriophyllum. Gay, 309," Select. Sera. Hort. Acad.<br />

Dresdensis, 1846. ("Gay" errore typographico pro Geyer.) " Po-<br />

teriiim myriophyllum, Reictienb. (N. Am. Geyer) Hort. Dresd. 1846 ;<br />

Eeichenb. pater in herb, tilii. Poterium annum, iNutt. msp. in Hooker,<br />

Flor. Bor.-Amer. i. (1140), p. 198. Sanguisorba annua, Nutt. msp.<br />

in Torr. et Gray, Flor. of Xorth Am. i. 429 ; Hooker, London Journ.<br />

of Bot. vi. (1S47) 219 : Torrey in Marcy, Exploration of the lied<br />

Q 2<br />

: ;

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