Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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Lawrence R. Heckard, Family Coordinator

Annual to shrubs, generally glandular, some green root-parasites
Stem generally round
Leaves generally alternate, simple, generally ± entire; stipules generally 0
Inflorescence: spike to panicle, generally bracted, or flowers 1–2 in axils
Flower bisexual; calyx lobes generally 5; corolla generally strongly bilateral, generally 2-lipped (upper lip generally 2-lobed, lower lip generally 3-lobed); stamens generally 4 in 2 pairs, generally included, a 5th (generally uppermost) sometimes present as a staminode; pistil 1, ovary superior, chambers generally 2, placentas axile, style 1, stigma lobes generally 2
Fruit: capsule, generally ± ovoid, loculicidal or septicidal
Seed: coat sculpture often characteristic
Genera in family: ± 200 genera, 3000 species: ± worldwide; some cultivated as ornamental (e.g., Antirrhinum, Mimulus, Penstemon ) or medicinal (Digitalis )
Recent taxonomic note: Recently treated to include only Buddleja, Scrophularia, and Verbascum in CA; other genera moved to Orobanchaceae (Castilleja, Cordylanthus, Orthocarpus, Pedicularis, Triphysaria), Phrymaceae (Mimulus), and Plantaginaceae (= Veronicaceae sensu Olmstead et al.)
Key to genera by Elizabeth Chase Neese & Margriet Wetherwax.



Margriet Wetherwax

Annual, sometimes partly submersed, with stolons
Leaves basal, erect; stipules generally present
Inflorescence scapose; flower 1
Flower: calyx bell-shaped, lobes 5, ovate, acute; corolla radial, bell-shaped, lobes 5, upper surfaces sparsely papillate; stamens 4; style generally subterminal, stigmas generally fused, head-like
Fruit elliptic to spheric, chambers 2 below, 1 above
Seeds many, minute
Species in genus: ± 15 species: worldwide
Etymology: (Latin: mud seat, from habitat)


L. aquatica L.

Leaf: petiole 3–10(30) cm, generally clearly differentiated from blade; blade 5–30 mm, flat, spoon-shaped to ovate; stipules 0 or sheathing leaf base, transparent
Inflorescence: pedicels << petioles, spreading in fruit
Flower: calyx lobes 2 X tube; corolla ± 2 mm, white to pinkish, outside sometimes blue, lobes acute; stamens attached at different levels; style 0.2–0.4 mm, stout, ± curved, stigma slightly 2-lobed
Fruit 3–5 mm, elliptic to spheric
Chromosomes: 2n=40
Ecology: Wet, muddy, periodically flooded places
Elevation: < 3200 m.
Bioregional distribution: Cascade Range, High Sierra Nevada, Central Coast, San Francisco Bay Area, San Bernardino Mountains, Modoc Plateau
Distribution outside California: to Alaska, e N.America, Eurasia
Horticultural information: TRY.

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bioregional map for LIMOSELLA%20aquatica 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 Limosella aquatica
Retrieve dichotomous key for Limosella
Overlay Consortium of California Herbaria specimen data by county on this map
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