Nymphaea rubra, Roxb. ex Andrews, 1808

Devi, Sagolsem Asharani & Thongam, Biseshwori, 2014, Two new taxa of Nymphaea (Nymphaeaceae) from Manipur, India, Phytotaxa 188 (2), pp. 112-117 : 116

1a. Leaf primary veins raised beneath......................................................................................................................................................2 b. Leaf primary veins impressed beneath...............................................................................................................................................8 2a. Leaves pubescent beneath; stamens without distinct sterile appendages; stigmatic appendages long, almost equaling stigmatic rays .....................3 b. Leaves glabrous; outer fertile stamens with prominent sterile appendages; stigmatic appendages much smaller than stigmatic rays .....................................................................................................................................................................................................4 3a. Leaf blades and petioles red when young; petals pinkish red; stamens red; fruits and peduncles red ..................................... 1. N. rubra b. Leaf blades and petioles green when young; petals white with pinkish tinge; stamens yellow; fruits and peduncles green.2. N. pubescens 4a. Stamens erect or in aged flowers the inner ones incurved; anther appendages blue or purple ..........................................................5 b. Stamens divergent, anther appendages white ................................................................................................................................6 5a. Leaves pale green with dark brown patches above; flowers blue; stamens less than 70. .............................................3. N. caerulea b. Leaves dark shiny green without any dark patches above; flowers purple; stamens more than 70. ..................4. N. micrantha 6a. Leaves elliptic-suborbicular, purple beneath; receptacle circular; flowers light blue; petals 9–15.............................. 5. N. nouchali b. Leaves elliptic-orbicular, purplish-brown beneath; receptacle quadrangular; flowers white or creamy white; petals 4–9 ...............7 7a. Leaves not mottled on both surfaces; sepals outer surface not mottled; flowers white; petals 4–7; carpels 12–14; stamens 20–30 .................................................................................................................................... 6. N. manipurensis