Vol. 2 POLYGONACEAE 121 
Rafflesia cumingii R. Br. in Trans. Linn. Soc. 19 (1845) 243; Hook. 
f. in DC. Prodr. 17 (1878) 112; F.-Vill. Novis. App. (1880) 174; 
Miq. Fl. Ind. Bat. 17 (1858-59) 684. 
Luzon (Kalinga, Laguna), Samar, Leyte, B. S. 253538 Yates, Elmer 
17895, Merrill Sp. Blancoanae 535. Parasitic on roots of Cissus in for- 
ests at medium altitudes; very local. Endemic. 
RAFFLESIA SCHADENBERGIANA Goppert ex Hieron. in Gartenflora * 
34 (1885) 3, t. 1177; Solms in Ann. Jard. Bot. Buitenz. 9 (1891) 
239, t. 26, f. 1-6, 17, Engl. Pflanzenreich 5(1901) 9; Koord. Bot. 
Overzicht Raffl. Nederl.-Ind. (1918) 81. 
Mindanao (Davao), Schadenberg & Koch. On roots of Cissus in for- 
ests, altitude about 800 m. Endemic. 
Local name: Bo-o (Bag.). 
EXCLUDED SPECIES 
RAFFLESIA PATMA Blume; F.-Vill. Novis. App. (1880) 174. 
BRUGMANSIA ZIPPELLII Blume; F.-Vill. 1. c. 
POLYGONACEAE 
1. RUMEX Linnaeus 
RUMEX ACETOSELLA Linn. Sp. Pl. (1753) 538; F.-Vill. Novis. App. 
(1880) 173. 
Luzon (Benguet). Introduced and thoroughly naturalized at Pauai, 
altitude about 2,400 m; it is very doubtful if F.-Villar saw actual 
Philippine specimens. A temperate country weed, native of Europe. 
RUMEX CRISPUS Linn. Sp. Pl. (17538) 335. 
Luzon (Benguet), Merrill 4295, B. S. 32017 Santos, 3527 Mearns. A 
native of Europe, now a widely distributed weed in temperate countries; 
in Benguet a recent introduction, but sparingly naturalized, altitude 1,400 
to 2,200 m. 
DOUBTFUL AND EXCLUDED SPECIES 
RUMEX CHINENSIS Champ.; F.-Vill. Novis. App. (1880) 173. 
RHEUM MURICATUM Blanco FI. Filip. (1837) 327 = Rumex muricatus Blanco 
op. cit. ed. 2 (1845) 195, ed. 3, 1 (1877) 346; Merr. Sp. Blancoanae 
(1918) 1386. 
This was described by Blanco from cultivated specimens, and was re- 
duced by F.-Villar, Novis. App. (1880) 173, to Rumex maritimus Linn. 
which is probably the correct disposition of it. The species, however, 
apparently no longer occurs in the Philippines, cultivated or otherwise. 
2. POLYGONUM Tournefort 
POLYGONUM APOENSE Elm. Leafl. Philip. Bot. 8 (1915) 2796. 
Mindanao (Davao, Lanao), Elmer 10754, F. B. 25230 Alvarez. In open 
glens in dense forests, altitude 1,000 to 2,000 m; an ally of Polygonum 
virginianum Linn. Endemic. 
Local name: Kariktit (Bag.). 
