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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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.

DOWNINGIA

Tina Ayers

Annual, glabrous
Stem decumbent to erect, (10)20–40 cm
Leaves cauline, often deciduous before flower, << flower bracts, 0.5–2(4) mm wide, lanceolate to awl-like (uppermost sometimes wider), sessile, generally entire
Inflorescence: spike; terminal flowers often aborted, overtopped by fertile
Flower sessile, generally inverted at full bloom by twisted ovary; corolla generally >> calyx, blue to pink or white, generally with a symmetric white or yellow spot on lower lip, tube entire, limb strongly 2-lipped, generally 2 lobes of upper lip < 3 of lower; stamens fused (filaments, anthers in tubes), generally 2 smaller anthers each with terminal tuft of bristles, 1 triangular or horn-like, generally 0.2–0.5 mm, others linear, shorter; ovary pedicel-like, chambers 1–2, placentas parietal or axile
Fruit dehiscent by 3–5 lateral slits
Species in genus: 13 species: w North America, Chile
Etymology: (A.J. Downing, American horticulturist, 1815–1852)
Reference: [Weiler 1962 PhD Univ of CA Berkeley]
Fl part positions (upper = next to stem; lower = away from stem) given at full bloom.

Native

D. pusilla Torr.


Flower not inverting; corolla 2.5–4 mm, < or = calyx, glabrous, upper lip 3-lobed, with 2 minute yellow spots near throat, lobes white or blue, narrowly triangular, acute; anthers < 45° to filaments; ovary 2-chambered, placentas axile
Fruit 20–27 mm; lateral walls tough, dehiscent along translucent lines
Seed spirally striate, appearing twisted
Chromosomes: n=11
Ecology: Vernal pools, roadside ditches
Elevation: < ± 150 m.
Bioregional distribution: Inner North Coast Ranges, s Sacramento Valley, n&c San Joaquin Valley
Distribution outside California: Chile
Synonyms: D. humilis (Greene) Rattan, dwarf downingia
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for DOWNINGIA%20pusilla being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Downingia pusilla
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