Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.



William J. Stone

Perennial, aquatic; caudex or rhizome generally horizontal, generally large
Leaves alternate, arising directly from caudex; petiole long; blades generally floating, submersed, or slightly emergent
Inflorescence: flowers solitary, axillary; peduncle long
Flowers generally bisexual; sepals 3–many, sometimes petal-like; petals 0–many, sometimes scale- or stamen-like, inserted on receptacle or side of ovary; stamens many, spirally arranged, filaments generally broad; ovary ± compound, superior to inferior, chambers 5–many, ovules many, styles finger-like or 0
Fruit spongy, berry-like
Genera in family: 6 genera, ± 60 species: worldwide.



Rhizomes prostrate, branched
Leaf: petioles generally cylindric in X -section; blade generally ovate to round, base deeply notched
Flower: sepals 5–14, spirally arranged, persistent; petals 10–20, scale- or stamen-like, thick and oblong to thin and spoon-shaped; stamens many, generally yellow, attached to receptacle; ovary compound, superior, chambers narrowed above, top expanded into disk-like stigmatic surface, stigmas in lines radiating from center
Seeds ovoid, smooth
Species in genus: ± 25 species: n hemisphere
Etymology: (Arabic name)
Reference: [Beal 1956 J Elisha Mitchell Sci Soc 72:317–346]


N. lutea (L.) Sm. subsp. polysepala (Engelm.) E.O. Beal

Leaf generally floating; blade 1–4 dm, oblong to ovate, lobes at base rounded to acute
Flower 5–7 cm wide; sepals 7–9(12), < 5 cm, outer ovate, green, inner broadly obovate, yellow to red-tinged; petals ± = stamens, petals, stamens yellow, sometimes red-tinged; stigmatic disk 1.5–2 cm wide, entire to deeply scalloped
Seed 3–5 mm
Ecology: Ponds, slow streams
Elevation: < 2500 m.
Bioregional distribution: Northwestern California, n&c Sierra Nevada, n&c Central Western California, Modoc Plateau
Distribution outside California: to Alaska, Rocky Mtns
Synonyms: N. p. Engelm., Nymphaea p. Greene
Horticultural information: Aquatic (fresh): 1, 2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24.
Recent taxonomic note: Nuphar polysepala Engelm.

previous taxon | next taxon
bioregional map for NUPHAR%20lutea%20subsp.%20polysepala being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Nuphar lutea subsp. polysepala
Retrieve dichotomous key for Nuphar
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page
  • This page is no longer being maintained.

University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California