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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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CAMPANULACEAE

BELLFLOWER FAMILY

Nancy Morin, except as specified

Annual to tree
Leaves generally cauline, generally simple, generally alternate, petioled or not; stipules 0
Inflorescence: panicle, raceme, spike, or flowers solitary in axils, generally open; bracts leaf-like or not
Flower: bisexual, radial or bilateral, sometimes inverted (pedicel twisted 180°; hypanthium generally present, ± fused to ovary; sepals generally 5; corolla radial to 2-lipped, generally fused (tube sometimes split down back), lobes generally 5; stamens 5, free or ± fused (anthers and filaments fused into tube or filaments fused above middle); ovary inferior, sometimes half inferior, chambers 1–3, placentas axile or parietal, ovules many, style generally 1, 2–5-branched
Fruit: generally capsule, dehiscing on sides or at tip by pores or short valves
Seeds many
Genera in family: ± 70 genera, ± 2000 species: worldwide. Some cultivated for ornamental (Campanula, Jasione, Lobelia ). Subfamilies sometimes treated as different families.

NEMACLADUS

Nancy R. Morin and Jennifer Milburn

Annual; roots fibrous
Stems erect or spreading, simple or branched at base or below middle
Leaves basal; petiole short or 0
Inflorescence ± raceme-like; bract 1 per flower, small; pedicel generally thread-like
Flower inverted; sepals linear to triangular; corolla nearly radial and 5-lobed or 2-lipped (upper lip 3-lobed, lower lip 2-lobed); filaments free at base, fused into tube above, sometimes appendaged at tube base, anthers free, all alike; ovary generally half-inferior in fruit, sometimes 0, hemispheric to obconic, sometimes glandular, stigma 2-lobed, papillate
Fruit generally > hypanthium, hemispheric to fusiform; tip pointed or rounded, dehiscing at tip by 2 valves; chambers 2
Seed elliptic to oblong
Species in genus: 13 species: sw US, nw Mex
Etymology: (Greek: thread-like branch)
Reference: [McVaugh 1942 N Amer Flora 32A: 1–134]

Native

N. sigmoideus G.T. Robbins


Stems widely spreading, 4–12 cm; base purplish brown
Leaf 1.5–10 mm, ovate to elliptic, sessile, entire or irregularly dentate, short-hairy
Inflorescence: axis strongly zigzag; bracts 0.8–1.5 mm, ovate; pedicels 10–18 mm, < 0.1 mm diam, spreading, S-curved, tip erect
Flower: hypanthium 0.5 mm; sepals ± 1.5 mm, lanceolate-deltate, erect, spreading in fruit; corolla 2.5–3.5 mm, deeply divided, white, yellow at tips, hairy, upper lobes erect, lower lobes spreading; filament tube 1.5 mm, tip curved, fine-hairy, anthers ± 0.3 mm; ovary nearly superior
Fruit ± 2 mm, widely fusiform (base and tip acute)
Seed ± 0.5 mm, widely elliptic; surface with zigzag ridges alternating with clearly pitted rows
Ecology: Sandy or gravelly soils, Joshua-tree woodland
Elevation: 50–2300 m.
Bioregional distribution: s Sierra Nevada, Tehachapi Mountain Area, Western Transverse Ranges, San Gabriel Mountains, e Peninsular Ranges, East of Sierra Nevada, Mojave Desert, nw Sonoran Desert
Distribution outside California: Nevada, Arizona, Baja California
Flowering time: Apr–Jun

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bioregional map for NEMACLADUS%20sigmoideus being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Nemacladus sigmoideus
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