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.


T.I. Chuang and Lawrence R. Heckard

Annual, green root-parasites
Leaves sessile, entire to 3-lobed
Inflorescence: spike; bracts entire to 5-lobed, tips generally colored
Flower: calyx 4-lobed, deepest sinus in back; corolla club-shaped, upper lip beak-like, tip closed, enclosing anthers and style, lower lip shorter, ± 3-pouched, generally 3-toothed; stamens 4, anther sacs 2, unequal; style and stigma slender
Fruit loculicidal, ± ovoid, generally ± notched
Seeds generally 8–15, often ± curved, ± keeled, attached at side; coat netted or ridged, tight-fitting
Species in genus: 9 species: w North America
Etymology: (Greek: straight fruit)
Reference: [Chuang & Heckard 1992 Syst Bot 17:560–582]
Close to Cordylanthus ; other species formerly placed here are in Castilleja (Owl's-clovers) or Triphysaria (Johnny-tuck).
Horticultural information: TRY with host; DFCLT.


O. luteus Nutt.

Plant 10–40 cm, glandular- and longer-nonglandular-hairy, yellow-green, often becoming ± purple-tinged
Stem generally simple, slender
Leaf 15–50 mm, ± linear, entire or upper deeply 3-lobed
Inflorescence 5–20 cm, densely glandular-puberulent; bracts grading into upper leaves, 10–20 mm, ± green, 2 lateral lobes below middle, narrowly triangular, central lobe ± lanceolate, 2–5 mm wide
Flower: calyx 5–8 mm, divided 3/4 in back, 1/3 in front, 1/4 on sides; corolla 10–15 mm, golden-yellow, exserted, puberulent (especially beak), lips ± equal, beak 2–4 mm, tip minute, downward-projecting, cylindric, lower lip moderately pouched, teeth 0.5 mm, blunt, incurved; stigma included
Fruit 5–7 mm
Seeds 20–35, yellowish to dark brown
Chromosomes: 2n=28
Ecology: Moist fields, sagebrush scrub, mtn meadows
Elevation: 1500–3000 m.
Bioregional distribution: Great Basin Floristic Province
Distribution outside California: to British Columbia, north-central US, New Mexico
Flowering time: Jul–Aug

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bioregional map for ORTHOCARPUS%20luteus 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 Orthocarpus luteus
Retrieve dichotomous key for Orthocarpus
Overlay Consortium of California Herbaria specimen data by county on this map
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