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Plagiobothrys reticulatus var. rossianorum
FORT ROSS POPCORNFLOWER

Higher Taxonomy
Family: BoraginaceaeView DescriptionDichotomous Key

Common Name: BORAGE or WATERLEAF FAMILY
Habit: Annual to shrub or small tree, or non-green root parasite, often bristly or sharp-hairy. Stem: prostrate to erect. Leaf: basal and/or cauline, generally simple, generally alternate. Inflorescence: generally cymes, or panicle-, raceme-, head-, or spike-like, generally coiled in flower (often described as scorpioid), generally elongating in fruit, or flowers 1--2 per axil. Flower: bisexual, generally radial; sepals (4)5(10), fused at least at base, or free; corolla (4)5(10)-lobed, salverform, funnel-shaped, rotate, or bell-shaped, generally without scales at tube base, with 0 or 5 appendages at tube top, alternate stamens; stamens epipetalous; ovary generally superior, entire to 4-lobed, style 1(2), entire or 2-lobed or -branched. Fruit: valvate or circumscissile capsule or nutlets 1--4, free (fused), smooth to roughened, prickly or bristly or not.
Genera In Family: +- 120 genera, +- 2300 species: tropics, temperate, especially western North America, Mediterranean; some cultivated (Borago, Heliotropium, Echium, Myosotis, Nemophila, Phacelia, Symphytum, Wigandia). Toxicity: Many genera may be TOXIC from pyrrolizidine alkaloids or accumulated nitrates. Note: Recently treated to include Hydrophyllaceae, Lennoaceae. Wigandia urens added, as naturalized.
eFlora Treatment Author: Ronald B. Kelley, Robert Patterson, Richard R. Halse & Timothy C. Messick, family description, key to genera; treatment of genera by Ronald B. Kelley, except as noted
Scientific Editor: Ronald B. Kelley, Robert Patterson, Thomas J. Rosatti, Bruce G. Baldwin, David J. Keil.
Genus: PlagiobothrysView DescriptionDichotomous Key

Common Name: POPCORNFLOWER
Habit: Annual (perennial herb), generally strigose to spreading-hairy; fibrous- to taprooted, staining red dye present or not. Stem: branched at base or above, < 5 dm. Leaf: cauline or basal and cauline, 0.5--10 cm, generally smaller tipward, linear to oblanceolate. Inflorescence: raceme- or spike-like cymes, coiled in bud, generally elongate in fruit; bracts 0--many. Flower: calyx lobes fused below middle, 2--10 mm in fruit; corolla rotate to funnel-shaped or cylindric, white or white with yellow area, tube generally +- yellow inside, limb 1--12 mm diam, appendages prominent to minute, white to yellow. Fruit: nutlets generally 4, +- ovate (triangular to +- lanceolate), rarely on narrow stalk or short peg, variously roughened, abaxially generally with central ridge, lateral ridges, cross-ribs, generally tubercled, occasionally prickly or bristly; adaxially keeled above attachment scar, scar on side generally near middle to base, sometimes on bottom or oblique (on angle between side and bottom), generally raised.
Species In Genus: +- 65 species: temperate western North America, western South America, northeastern Asia, Australia. Etymology: (Greek: sideways pit, from position of nutlet attachment scar) Note: Nutlet characters in key generally best for 3 nutlets farthest from stem; yellow on corolla changes to white after pollination.
Unabridged Note: Fully mature nutlets needed for identification; in many species nutlet closest to stem often more firmly attached, larger, differently textured, and with completely different attachment scar than other 3; nutlet characters used in key focus on 3 more loosely attached nutlets. Intergradation common in some species groups; reticulate speciation in genus; sect. Allocarya often treated as separate genus; many species need study. Corolla size can diminish markedly during flower period. Yellow corolla appendages and, if present, contrasting yellow corolla centers, change to white after successful pollination.
Species: Plagiobothrys reticulatusView Description 

Common Name: TRACY'S POPCORNFLOWER
Habit: Annual, +- strigose. Stem: decumbent or sprawling to erect, 1--4 dm. Leaf: cauline, lower 3--8 cm. Inflorescence: bracts below middle. Flower: calyx 2--4 mm, appressed- to spreading-hairy; corolla limb 1.5--3.5 mm diam, appendages yellow. Fruit: nutlet dull, brown to gray; abaxial ridge rounded, lateral ridges +- 0; adaxial ridge in trough; scar oblique, narrow-elliptic to triangular, concave, sunken.
Note: Varieties intergrade.

Plagiobothrys reticulatus var. rossianorum I.M. Johnst.
NATIVE
Stem: +- decumbent or sprawling, occasionally ascending. Fruit: nutlet 1.1--1.9 mm, oblong-ovate, +- flat; abaxial cross-ribs +- few, scattered, irregular, interspace tubercles generally dense or large; adaxial ridge in narrow groove; scar bordered by generally narrow, +- obscure trough.
Ecology: Moist places in coastal grassland, beach deposits, mud flats; Elevation: < 800 m. Bioregional Distribution: NCo, CCo, SnFrB, SCoRO. Flowering Time: Apr--Jun
Synonyms: Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnst. var. penicillatus (Greene) Cronquist, in part
Unabridged Note: Highly variable, related to Plagiobothrys reticulatus var. reticulatus, but suggestive of hybridization involving Plagiobothrys bracteatus, Plagiobothrys diffusus; study needed.
eFlora Treatment Author: Ronald B. Kelley, Robert Patterson, Richard R. Halse & Timothy C. Messick, family description, key to genera; treatment of genera by Ronald B. Kelley
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Citation for this treatment: Ronald B. Kelley, Robert Patterson, Richard R. Halse & Timothy C. Messick, family description, key to genera; treatment of genera by Ronald B. Kelley 2016. Plagiobothrys reticulatus var. rossianorum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=63901, accessed on May 05, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 05, 2016.


Plagiobothrys reticulatus var. rossianorum
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© 2015 Barry Breckling

More photos of Plagiobothrys reticulatus var. rossianorum in CalPhotos


Geographic subdivisions for Plagiobothrys reticulatus var. rossianorum:
NCo, CCo, SnFrB, SCoRO.
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.