Pontederiaceae

Pontederia L.

Last edited by Pieter B. Pelser, 2 December 2020
  1. Pontederia crassipes Mart., Nov. Gen. Sp. Pl. 1 (1824) 9; ≡ Eichhornia crassipes (Mart.) Solms in A.DC. & C.DC., Monog. Phan. 4 (1883) 523; Merr., EPFP 1 (1922) 200; Backer, Fl. Males. ser. 1, 4 (1951) 255; Type: from Brazil (lecto). Distribution: S America. Notes: Introduced in the tropics and subtropics worldwide. In the Philippines since around 1912 as an ornamental, now an ubiquitous weed clogging water courses all over the country. Water hyacinth. Invasive species (CABI 2017, as Eichhornia crassipes). Naturalized.
  2. Pontederia hastata L., Sp. Pl. (1753) 288; ≡ Monochoria hastata (L.) Solms in A.DC. & C.DC., Monog. Phan. 4 (1883) 523; Merr., Fl. Manila (1912) 141; EPFP 1 (1922) 200; Backer, Fl. Males. ser. 1, 4 (1951) 258; Type: from Sri Lanka (lecto). Distribution: Bangladesh, China, India, Java, Laos, Malaysia, Myanmar, Nepal, New Guinea, Philippines, Sri Lanka, Thailand, Vietnam. Notes: Throughout the Philippines at low and medium elevation; common in open wetlands, swamps, etc. Native.
  3. Pontederia vaginalis Burm.f., Fl. Indica (1768) 80; ≡ Monochoria vaginalis (Burm.f.) C.Presl, Rel. Haenk. 1 (1827) 128; Merr., Fl. Manila (1912) 141; EPFP 1 (1922) 200; Backer, Fl. Males. ser. 1, 4 (1951) 256; Type: from India (lecto). = Monochoria vaginalis var. pauciflora (Blume) Merr., EPFP 1 (1922) 201; ≡ Pontederia pauciflora Blume, Enum. Pl. Javae 1 (1827) 32. Distribution: Afghanistan, Australia, Bangladesh, Bhutan, Cambodia, China, India, Japan, Java, Korea, Laos, Malaysia, Middle East, Myanmar, Nepal, New Guinea, Pacific Ocean, Pakistan, Philippines, Russia, Sri Lanka, Thailand, Vietnam. Notes: Throughout the Philippines from the lowlands up to 2000m; common in periodically inundated or water-logged open waste sites, rice paddies, swamps, etc. Native.

Possibly present

  1. Pontederia azurea Sw., Prodr. (1788) 57; ≡ Eichhornia azurea (Sw.) Kunth, Enum. Pl. 4 (1843) 129. Distribution: C & S America. Notes: Reported for the Philippines by Moody (1989) as a weed in rice, but no specimens cited. Naturalized.

References