POSSIRA, Aubl. Pl. Gui. ii. 934. 
Swartzia, Schreb. (Legumin.). 
arborescens, Aubl. 1. c. —S. triphylla. 
dodecandra, Poir. Encyc. v. 577 =S. dodecandra. 
grandiflora, Poir. Encyc. Suppl. iv. 532 2S. grandiflora, 
pinnata, Poir. l. c, 533 — S. pinnata. 
simplex, Sw. Prod. Veg. Ind. Occ. 82; Poir. Encyc. v. 
577 =S. grandiflora. 
triphylla, Sw. l. c. — S. triphylla. 
t. 855 (1775) = 
POSSIRIA, Steud. Nom. ed. II. ii. 653, in syn. (1841), 
sphalm. — praec. 
POSSURA, Aubl. ex Steud. Nom. ed. II. ii. 383 (1841) 
= praec. 
guianensis, Aubl. ex Steud. l. c. — S. triphylla. 
POS'TIA, Boiss. & Blanche, in Boiss. Fl. Orient. iii. 182 
(1875). COMPOSITAE, Benth. & Hook. f. ii. 1233. 
bombycina, Boiss. & Haussk. in Boiss. l. c. 183.— 
Persia. 
lanuginosa, Boiss. 1. c. 182.—Syria. 
microcephala, Boiss. [. c. 183.— Persia. 
puberula, Boiss. & Haussk. l. c. —Persia. 
POSTUERA, Rafin. Sylva Tellur. 10 (1838) = Notelaea, 
Vent. (Oleac.). 
longifolia, Kafin. |. c. 2 N. longifolia. 
POTALIA, Aubl. Pl. Gui. i. 394. t. 151 (1775). 
LOGANIACEAE, Benth. & Hook. f. ii. 795. 
NICANDRA, Schreb. Gen. 283 (1789). 
amara, Aubl. PI. Gui. i. 394. t. 151.—Guian. 
amara, Desf. Cat. Hort. Par. ed. III. 127 - Clavija 
lancifolia. 
resinifera, Mart. Nov. Gen. et Sp. ii. 80 — amara. 
POTAMETA, Thou. Gen. Nov. Madag. 5 (1806). 
LAURINEAE, Benth. & Hook. f. iii. 154. 
Chapelieri, Baill. in Bull. Soc. Linn. Par. i. (1885) 
446.-—Madag. 
Thouarsii, Roem. & Schult. Syst. iii. 476.—Madag. 
POTAMICA, Poir.in Dict. Sc. Nat. xliii. 94 (1826) = praec. 
POTAMOBRYON, Liebm. in Forh. Skand. Naturf. 
Kjoeb. (1847) 518. PODOSTEMACEAE, Benth. & 
Hook. f. iii. 1219. 
concinnum, Liebm. 1. c.—Mexic. 
laxum, Liebm. /. c. 514.—Mexic. 
patulum, Liebm. /. c. 515.— Mexic. 
POTAMOCHARIS, Rottb. in Act. Lit. Univ. Hafn. i. 
(1778) 296 — Mammea, Linn. (Guttifer.). 
Mamet, Rottb. l. c. 2 M. americana. 
POTAMOCHLOA, Griff. in Journ. As. Soc. Beng. v. 
(1836) 571= Hygroryza, Nees (Gramin.). 
Retsit, Griff. 1. c. 571. t. 24 =H. aristata. 
POTAMOGETON, (Tourn.] Linn. Syst. ed. I (1735); 
Gen. ed. I. 33 (1737). NAJADACEAE, Benth. & 
Hook. f. iii. 1014. 
BUCCAFERREA, Bubani, in Nuov. Giorn. Bot. Ital. v. 
(1873) 316. 
GROELANDIA, Fourr, in Ann. Soc. Linn. Lyon, N.S. 
xvii. (1869) 169. 
GROENLANDIA, J. Gay, in Comp. Rend. Acad. Sc. 
xxxviii. (1854) 703. 
PELTOPsIS, Rafin. in Journ. Phys. Ixxxix. (1819) 101 
SPIRILLUS, J. Gay, in Comp. Rend. Acad. Sc. xxxviii. 
(1854) 703. 
acuminatus, Schum. Enum, Pl. Saell. i. 49 2 lucens. 
acuminatus, Trevir. ex Roem. & Schult. Syst. iii. 509, 
in obs. = lucens ? 
acuminatus, Wahlenb. Fl. Upsal. 58 = praelongus. 
acutifolius, Hornem. in Fl. Dan. t. 2046 — compressus. 
acutifolius, Link, in Roem. & Schult. Syst. iii. 513.— 
Europ. ; Keg. Caucas. ; Austral, 
acutifolius, J. '& C. Presl, Fl. Cech. 37 = Friesii. 
affinis, Boenn. ex Gham: & Schlecht. in Linnaea, ii. 
(1827) 216 — natans. 
alpino-natans, /. Schultz, in Pollichia, xx-xxi. (1863) 
228.— Europ. centr. 
alpinus, Balb. Misc. 13 — rufescens. 
amblyophyllus, C. A. Mey. Beitr. Pfl. Russ. Reich. vi. 
10 = pectinatus. 
VOL. II. 

POSSIRA—POTAMOGETON. 
609 

POTAMOGETON :— 
americanus, Cham, & Schlecht. in Linnaea, ii. (1827) 
226 — lucens ? 
americanus, Roem, & Schult. Syst. iii. 509 — lucens. 
amplexicaulis, Kar. im Bull. Soc. Nat. Mosc. (1839) 
173.— Turkestan. 
amplifolius, Tuckerm. in Am. Fourn. Sc. Ser. I. xlv. 
(1843) 38 ; II. vi. (1848) 225.—A m. bor. 
angustatus, Wallm. Fl. Ostrog. ed. I. (1812) (ex Ar. 
Benn. MS.) — acutifolius. 
angustifolius, Bercht. & Presl, ex Opiz, Boehm. Gew. 
23 — lucens ? 
angustifolius, Bercht. & Presl, Rostl. i. Alismac. 19 = 
pectinatus, 
angustissimus, 77. D. & K. Nov. Gen. et Sp. i. 870.— 
Mexic. 
annulatus, Bell. in Mém. Acad. Turin, x, xi. (1802-3) 
447 — rufescens. 
Augustani, Bell. l. c. 448, in nota — seq. ? 
augustanus, Balb. Misc. 14. t. 3-- gramineus. 
Lerchtoldi, Fieb.in Berch. & Fieb. Botamog: 40.t, 4— 
pusillus. 
Berteroanus, Phil. in Linnaea, xxx. (1859-60) 200.— 
Chili. 
Besseri, Steud. Nom. ed. II. ii. 884 — natans. 
bifolius, Lapeyr. Hist. Abr. Pl. Pyren. Suppl. 27 — 
Vicia Faba (fide Benth. Cat. Pl. Pyr. 113). 
Billotii, F. Schultz, Arch. Fl. Fr. et Allem. 61— 
fluitans. 
borealis, Rafin. in Med. Repos. N. York, v. (1808) 
354 — marinus. 
caespitosus, Humnichki, Cat. Pl. Luxeuil, 60 5 Suppl. 
90.—Europ. 
caespitosus, Nolte, in Fl. Dan. t. 2889 — rutilus. 
canariensis, Link, in Buch, Beschr. Canar. Ins. 188 — 
fluitans. 
capillaceus, Poir. Eneyc. Suppl. iv. 535 — hybridus. 
caricifolius, Willd. ex Schult. Mant. iii. 367 —tenui- 
folius. 
Casparii, Weyl, in Oestr. Bot. Zeitschr. xx. (1870) 321 
— rufescens. 
Casparyi, Kohts, l. c. 291— praec. 
caudatus, Seidl, ex Opiz, Boehm. Gew. 23 — lucens. 
cespitosus, Reichb. f. Skizze von Nolte, 21— rutilus. 
Cheesemanii, Ar. Benn. in Tourn. Bot. xxi. (1883) 66. 
—N. Zel. 
Claytonii, Tuckerm. in Am. S'ourn. Sc. Ser. I. xlv. 
(1843) 38.—Am. bor. 
coloratus, Hornem. in Fl. Dan. t. 1449.—Europ. 
complanatus, Willd. in Ges. Naturf. Fr. Berl. Mag. iii. 
(1809) 297 — compressus. 
compressus, All. Fl. Pedem. i. 240 — acutifolius. 
compressus, Linz. Sp. Pl. 127.—Reg. bor. temp. 
compressus, Reichb. Fl. Germ. Excurs. 8 — Friesii. 
compressus, Sm. Fl. Brit. i. 856; Mert. & Koch, 
Deutschl. Fl. 1, 856 = pusillus. 
compressus, Wahlenb. Fl. Suec. 110 — obtusifolius. 
condylocarpus, Tausch, in Flora, xix. (1836) 428— 
densus. 
confervoides, Reichb. Ic. Fl. Germ. vii. 18 — Tucker- 
mani. 
contortus, Desf. Fl. Atlant. i. 150 — Zannichellia 
contorta. 
corniculatus, Schur, Enum. Pl. Transs. 632 = lucens. 
cornutus, J. & C. Presl, Fl. Cech. 37 =lucens. 
crassipes, Kit. ex Cham. & Schlecht. in Linnaea, ii. 
(1827) 204 — gramineus. 
crenulatus, D. Don, Prod. Fl. Nep. 22 — crispus. 
crispatus, Wallm. ex Reichb. Fl. Germ. Excurs. 8= 
crispus. 
crispus, Darl. Fl. Cestr. 23 = perfoliatus. 
crispus, Laterr. ‘Fl, Bordel. (1811) 71, partim =hetero- 
phyllus. 
crispus, Linn. 
austr. 
cristatus, Regel & Maack, in Regel, Tent. Fl. Ussur. 
139.—Reg. Amur. 
curvifolius, Hartm. Fl. Scand. ed. I. 78 - nitens. 
Sp. PI. 126.—Reg. temp. bor. et 


cuspidatus, Schrad. ex Mert. & Koch, Deutschl. Fl. i. | 
854 — acutifolius. 
cuspidatus, Schrad. in Sm. Engl. Fl. i. 234 
compressus. 
decipiens, Nolte, ex Koch, Syn. Fl. Germ. ed. II. 779. 
— Europ. 
delicatulus, Bertol. Misc. Bot. xv. 17 = hybridus. 
densus, Linn. Sp. PI. 126.—Reg. bor. temp. 
densus, Schwein. ex Beck, Bot. U. St. 368- Elodea 
canadensis. 


POTAMOGETON :— 
denticulatus, Link, in Buch, Beschr. Canar. Ins. 138 = 
pusillus. 
denticulatus, Mohl & Schlecht. in Bot. Zeit. xiv. (1856) 
783, sphalm. = delicatulus. 
digynus, Wall. Cat. n. 5177.—1nd. or. 
dimorphus, Rafin. in Am. Monthly Mag. (1817) 358 = 
P. Spirillus. 
distachyus, Bell.in Mém. Acad. Turin, x, xi. (1802-8) 
447, in nota — gramineus. 
divaricatus, Wolfg. ex Schult. Mant. iii. 355.—Hab. ? 
diversifolius, Barton, Fl. Philad. Prod. 27 = P. Spirillus. 
diversifolius, Rafin. in Med. Repos. N. York, v. (1508) 
354 — hybridus. 
Drummondii, Benth. FI. Austral. vii. 171.—Austral. 
drupaceus, Láng, in Flora, xxix. (1846) 
pectinatus. 
elegans, Wall. Cat. n. 5178— polygonifolius. 
epihydrum, Rafin. in Med. Repos. N. York, v. (1808) 
254 — natans ? 
exstipulatus, Muhl. Cat. 18 = pauciflorus. 
exstipulatus, Willd. ex Schult. Mant. iii. 365= 
angustissimus, pauciflorus. 
fasciculatus, Wolfg. in Schult. l. c. 2 marinus. 
filicaulis, Schur, Enum. Pl. Transs. 633 = pectinatus. 
filifolius, Phil. Fl. Atac. 50 = Ruppia maritima. 
filiformis, Nolte, Nov. Fl. Holsat. 20 = marinus. 
filiformis, Pers. Syn. i. 152 — pectinatus. 
filiformis, Pursh, ex Tuckerm. in Am. Journ. Sc. 
Ser. II. vi. (1848) 230 — hybridus. 
filiformis, Rafin. in Med. Kepos. N. York, Ser. III. ii. 
(1811) 409.—Am. bor. 
flabellatus, Bab. Man. 
pectinatus. 
flexicaulis, Dethard. [in Strelitz. Anzeig. (1809) n. 50] 
ex Koch, Syn. Fl. Germ. ed. I. 676 — DrerlOn ets 
flexuosus, Schleich. Cat. Pl. Helv. ed. III. 23; iv. 27 = 
praelongus. 
fluitans, Liljebl. Fl. Suec. ed. II. 71 =sparganifolius. 
fiuitans, Pursh, Fl. Am. Sept. i. 120 — Claytonil, 
fluitans, Roth, Tent. Fl. Germ. i. 72; ii. 202.—Reg. 
temp. et trop. 
Jluitans, Sm. F1. Brit. iii. 1391 — rufescens. 
fluviatilis, Roem. & Schult. Syst. iii. 570 (Index) = 
lucens. 
foliorum, Rafin. in Med. Repos. N. York, Ser. IIL ii. 
(1811) 409 — gramineus ? 
foliosus, Rafin. 1. c. Ser. II. v. (1808) 354 = pauciflorus. 
Friesii, Rupr. Beitr. Pfl. Russi. iv. 43.—Europ. 
Gaudichaudii, Cham. & Schlecht. in Linnaea, ii. 
197 — mucronatus ? 
gemmiparus, Robbins, ex Morong, in Coult. Bot. 
v. (1880) 51— pusillus ? 
glaucus, Gueldenst. Reisen, i. 49 (Quid ?).—Ross. 
gracilis, Fries, Nov. Fl. Suec. ed. II. 50.—Suecia. 
gracilis, Wolfe. in Schult. Mant. iii. 355.—Sibir. 
gramineus, K. Br. Prod. 343 = ochreatus. 
gramineus, Linn. Sp. P/. 127.— Europ. 
gramineus, Michx. Fl. Bor. Am. i. 102 = pauciflorus. 
gramineus, Savi, Fl. Pis. i. 194— pusillus. 
gramineus, Sm. Fl. Brit. i. 196 = obtusifolius. 
gramineus, Wahlenb. Fl. Upsal. 57 — nitens. 
graminifolius, Benko, Transs. i. 123 =gramineus. 
Griffithii, dr. Benn. in. Tourn. Bot. xxi. (1883) 65.— 
Cambria. 
Grisebachii, Heuff. in Verh. Zool. Bot. Ges. Wien, viii. 
(1858) 200 — rutilus. 
helodes, Dum. Fl. Belg. 163 -— coloratus. 
heterophyllus, Auct. ex Fries, Nov. Fl. Suec. ed. II. 
35; Sm. ex Nym. Consp. 652— nitens, 
heterophyllus, Biroli, Fl. Acon. i. 53— polygonifolius ? 
heterophyllus, Buch.-Ham. ex Wall. Cat. n. 5181 
javanicus. 
heterophyllus, EM. Sketch, i. 
472 = 
Brit. Bot. ed. III. 
343 = 
1827 
Gaz. 
med. 
002 P. 
Spirillus? 
heterophyllus, Schreb. Spicil. Fl. Lips. 21 graminens. 
heterophyllus, Torr. Comp. Fl. N. St. 88 = hybridus. 
Hillii, Morong, in Coult. Bot. Gas. vi. (1881) 290.— 
Am. bor. 
Hornemanni, E. Mey. Chlor. 
hybridus, Michx. Fl. Bor. Am. 
Hanov. 521- coloratus 
1. 101.—Am. bo 
hybridus, Petagna, Inst. Bot. ii. 289; Thuill. Fl. 
Par. ed. II. 86 = gramineus. 
illinoénsis, Morong, in Coult. Bot. Gaz. v. (1880) 5 
—Am. bor. 
indicus, Roth, ex Roe m. & Schult. Syst. iii. 516 
Aponogeton monostachyon. 
indicus, Roxd. Hort. Beng. 12; Fl. Ind. i. 452. 
Ind. or. 
4 I 
