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Sylloge algarum omnium hucusque cognitarum

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Siphoneio, Vaucheriaccie, Vaucheria. 397<br />

gli», Sueciie, Austriae, AmericaG borealis. — Oogonii basis nonnunquam<br />

sane contracta et pauUum elevata, qua re oogonia quasi<br />

pedicellata apparent, sed septum reperitur semper in thalli super-<br />

ficie, ergo sessilia sunt.<br />

4. Vaucheria ornithocephala Ag. Sp. p. 467, Rabenh. Alg. n. 1100! 1025<br />

non Hassall, Nordst, Algol. Smasaker II, in Botan. Not. 1879, p. 184,<br />

Vaucheria sericea Lyngh. Hydroph. p. 78, t. 21 B, Kuetz. Spec.<br />

Alg. p. 487, n. 9, Walz 1. c. pag. 150, n. 7, t. XIII, f. 20 et 21,<br />

Rabeuh. FI. Eur. Alg. III, p. 271, Cooke Brit. Freshw. Alg. p. 121,<br />

1. 47, f. 4-8, Wolle Freshw. Alg. U. S. p. 150, t. 127, f. 12-13,<br />

Hansg. Prodr. p. 234, Con/eroa vesioala Dillw. Conf. t. 74, VaKrcheria<br />

ramosa Arech. Los Vauch. Montevideanos 1883 Cfr. Ma-<br />

gnus in Botan. Zaituiig 1883, p. 627, Vaucheria pulchella Arech.<br />

Los Vauch. Montevideanos 1883 Cfr. Magnus in Botan. Zeitung<br />

1883, p. 627 (an aptius Vaachericv aversce adscribenda?), Vaif,-<br />

cheria polysperma Hassall Freshw. Alg. p. 59, n. 12, t. VI, f. 6,<br />

Kuetz. I. c, Rabenh. Alg. n. 1375!, Cleve Vauch. p. 7, n. 8, f. 8. —<br />

Ca3spitibus dense intricatis, luteolo- vel sordide viridibus vel fu-<br />

scescentibus; thallo tenui, 50-75 v.. lato, laxe et vage ramoso,<br />

ramis subaiquilatis ; chlorophoris subglobosis, numerosis, 3-5 a.<br />

crassis; oogouiis 2-6-seriatis, unilateralibus, oblique ovalibus, 30-<br />

45 [j.. latis, ly^-plo longioribus, ore laterali producto rostellatis, ses-<br />

silibus vel brevissime pedicellatis ; antheridiis cylindraceo-subcla-<br />

vatis, subhorizontali-deflexis, 14-24 ix. latis, subquadruplo longio-<br />

ribus ; antherozoidiis oblongis, puncto rubro notatis (teste De-Bary),<br />

in utroque polo cilio unico praeditis.<br />

Hab. per totam Europam et Americam borealem passim —<br />

Forma marina, Vaucheria ornithocephala Le Jolis Alg. mar. Cherb.<br />

n. 119 nec Hass. : habitu robustiore. In aquis submarinis, fossis li-<br />

toralibus prope Saint-Vaast-Ia-Hougue (Le Jolis).<br />

5. Vaucheria Dillwynii (Web. et M.) Ag. Syst. 173, Hassall 1. c, Ra- 1026<br />

benh. Krypt. Flor. v. Sachs. I. 224, Alg. 750, FI. Eur. Alg. III,<br />

p. 269, Cooke Brit. Freshw. Alg. p. 122, t. 47, f. 9-10, De-Toni e<br />

Levi FI. Alg. Veu. IV, p. 90, Erb. critt. ital. n. 861, V. pachyderma<br />

Walz in Pringsh. Jahrb. 1866, p. 142, t. XII. f. 1-6, V.<br />

Hookeri Kuetz. Tabul.?, V. Ungeri Thur. in Ann. des sc. nat. 1843,<br />

tab. 13, f. 43?, Conferva frigida Dillw. Brit. Conf. tab. 10. —<br />

Terrestris, late expansa, stratum depressura, tenue vel ad 2 mm.<br />

crassum, laete vel obscure viride formans ; oogoniis globosis vel<br />

ellipsoideis (haud raro subreniformibus), rostratis, sessilibus, ple-

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