268 



J. O. HAGSTROM, CRITICAL RESEARCHES OS THE POTAMOOETO>"S. 



dimorph. X pusillus (P. dimorphoides Hagstr.). — 263. 

 dissimUis Au. Besn., New Pot., in .Tonni, of Bot. 1910, 



150. — 52, 53. 

 (hsliiclii/us Bkllakdt. — 205. 

 distaehyus IV< n., Bem. Pot. etc. iu Mitt. Bäver. Bot. 



15)14, 106: Zizn M. K., luBUfl. 

 distinctus Au. Benn., Notes etc. in Journ. of Bot. 1904, 



72. 198, 247, 248. 



divaricattu Wo-lfg. — 221. 

 dirr,.-iiolius BASTON, Fl. Philad. Prodr. 1815, I, 27 ( 



dimorphus RAF. et setaceus Prnsii, e B AF., Ain. 



monthly Mag. etc 1817, 358). 

 diversifdliue Mebt. & KOCH in RÖHX., Deutschl. Fl., 



L823, 84!): lurens L., var. 

 diversifolius Eaf. 127, 134, 136—138. 



Drueei Pbyeb. 146 147. 



Druinmoudii Benth., in Bentii. & Mull., Fl. anatral. 



VII, 1878, 171. - 169, 172, 173. 

 drupoceus Lam;, in Flora II, 1846, 472. - - 40. 

 drapaeeus Kocb ap. Lang., 1. c, peetinatus L. |3. 

 tlualis BAGSTB, ijiiiiiDintit. >' pusillus). - 103, 104. 

 dvbitu Ti-. 217, 21!). 



Diischlii Pibch., Bäver. Pot. 1907, 42: gessnacensWFlSGH. 



var. 

 elegans TlS. Pot. -ner. oxs. II, 1895, n. 85, 86: pr al. 



Wi i. k. f. 251. 

 degatu WALLICH, Catal. 1828, n. 5178. — 156, 176. 

 (Ilipiiriiolius Roirr, Fl. Fr. T. XIII, 315: pnelongue 



Wi i.i. p. 



eUipticus GATJD., Fl. Iielv. 1, 1828, 467: natans L. V. 

 rllii>iirtts Kii:-i in. u.r.u, Fl. d'Als. 2, 114: fluitans Rth. 



var. 

 dongatus Bge ap. Hagstb. — 226. 

 dongatus Bge aj>. Daii.a Tokre & SakkTH., Fl. Tir. 



VI, 1906, 134: fUiformk Pers. var. 

 chiiniiiliis An. BENN. iii MACOTTN, Cat. ('anad. pl. V, 1890, 



.'!7 1 : juisilhis I,., V. - 124. 



dongatus di. & Scbx. — 117. 



dongatus Fisch., 1. o., 37: notans L., f. 1. c, 115: 



jl Ils il I US L. f. 



dongatus 11 \<.» 1 1:. — 60. 



dongatus Ki i.iin ap. Auuomf.it, Ber. etc. in Sohr. Phya. 



ök. Ges. Kön. IH93, 43: fluitans Rth., f. - 188. 

 dongatus Lange ap. Bebvteb, Rech. fl. Loir, 1885, 49: 



polygonif. Poi itu. var. 

 dongatus Mebt. ,V K. ap. RÖHX. Deutsohl. Pl. I, L823, 



815: heteroph. Schb., var. (a dnbioua form). 

 dongatus Mebt. & l\. ap. Fteb., Pot. Bohm. 1838, 26 



( 1 ReICHENB., le. 1845, 24: '/.izii M. K., var. 

 214, 216. 



dongatus Wabxenb. !»i 



ejrihydrum Ku. in Med. Repoaitory VI: 6, 1808, 354 

 (by \i:. Benn. oonaidered i<> be identio with /'. 

 Xiiiitiilit uhiiii is oontradioted l>y the désoriptioii 

 of the snbm. leavea; foliia subxnersiB Bub- 



oordatia: B u . Med. Rep, 1811, 109. The name 

 is bo be rejeoted). 139. 



epihydrum ti'. Olayt.) X angustifoUus (Zieii) ta Au. 

 Benn., Notes eto. in Journ. of Bot. 1904, 71 (sug 

 gestion df hybridity: Au. Benn., 1. o.). 



erieetorum STHS, EnGL. Bot. ed. 3. vol. IX, 1869, 28: 



polygonif. Pourr., var. — 177. 

 cu-Cooperi GbABBNEB. 62. 



eu-deripiens ÄSCH. &: Gr. — 246. 

 excdaus Hagstr. - 235. 

 exiguus Hagstr. 104, 106—107. 

 ejcornatus HAGSTR. — 256. 

 explanatus Mebt. & K. 184. 

 exstipulatus Mtjhl., Cat. pl. Am. sept. 1813, is (not 



further known; only desoribed by ;i name: »Hol- 



low-leaved pondweed i. 

 exstipulatus Whjld. in Schultes, Mantissa etc. 1827, 



365 (A dubioUB form; pert. L. ex ChAM., Linniea 



1827. 166, and others). 

 e.rlensus Tis. ap. BAGSTR. 225, 229. 230. 



falcatus Asch. & 6b., Syn. I 1S97. 326: graminevs X 



nitens, var. 

 falcatus Pbteb. 209, 221, 231. 

 fattax ASCH. & Gb., I. <■., 330 (nitens X perfoliatus). 

 fasciculatus Wolfg. 14, 17, 18. 

 Fauriei Au. B benn. Notes etc. in Jonrn. Bot. 1984, 76. 



84. 

 Faxoni Mob. 200. 

 fennious Hagstb. 24, 52. 

 ferruglnens Hagstb. 161, 162. 

 fibrosns Hagstb. 160, 183, l !».->. 

 Fieberi Rotnr, Pl. Pr., T. XIII, 320: pueiäus 1-., raee 1 



filieaidis SCHTJR. — 40. 



filifalius Piiil., Flornia atac. 1860, 50 (= Uuppia ol>- 



tusa Hagstb.). 

 filifornils Pebs. Il 30, 33, 34, 4 3. 47. 

 filif. X peetinatus, ex ALMQUIST. 20 — 24. 



filif. X vaginatu8, ex Pontell. — 24, 25. 

 jiliionuis U.w., iii .Med. Rep. N. Y. 3: 2, 1811, 409 (ean- 



not 1)0 identified). 

 Fiacheri Gbaebneb, Syn. mitteleur. Pl. 1913, 504: (per- 



foliatus X gramin., e\ PI8CHEB). 

 Iisrhrii BAGSTR, 62. 



flabellatus, Bak. 22 23, 40, 41, 48, 4!). 

 flabdlatus Crép., Notes etc. L864, 45: pert in. 1... var. 



fl a reset' n s PlSCH., 1. 0., 116: jiusilllis I.., f. 



flexicaulis Di. in 250. 



ilriuosus Wbed. 250. 



floridanus Au. Benn. 198, 204, 235. 



floridnnus Small; Pl. of the Sontheasl U. B., 1903, 37 



(probably belonging to the group A »i pH fal ii). 

 fluetuans Tis. Pot. snee. exa. I. 1894, n. 28 29. 145, 



206. 

 fluitans C088, & Gebm., Pl. env. Par. 1845, 571: Uteens 



L., v. 237. 

 fluitans Kim, Tent. il. Cenn. i. i7ss, 72 (Varionaly oon 



ceived by different authora: Smith, Pl. Brit. 1800 



= alpin. B.U.H.; BO alBO PL Dan. I. 1450, l.nt t. 2105 

 as P. strrilis BAGSTR, CHAM., \iln.. 1815 natans 

 L., var. DC, Pl. fr. rariiiol ius THOBI . 



Mi ^ i k, Chlor. lian. 1836 obiongus X\\. a. ete.). 

 180, 184, 1S5, 217, 238, 240, 241. 



Iluit. X natans (/'. Srhreben FiSCH., 1. c, 69 61, IM 



tatis x nodotus <\ Hagstb i 185. 

 flwnineus Hagstb. 225, 228. 





