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Vascular Plants of California
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Lappula squarrosa
TWO-ROWED STICKSEED


Higher Taxonomy
Family: BoraginaceaeView DescriptionDichotomous Key
Common Name: BORAGE FAMILY
Habit: Annual, perennial herb, or shrub, often bristly or sharp-hairy. Stem: prostrate-decumbent to erect. Leaf: basal and/or cauline, simple, generally alternate, sometimes opposite, especially at base. Inflorescence: cymes, arranged singly or in groups of 2--5, generally coiled in flower, generally elongating in fruit. Flower: bisexual, generally radial; sepals 5, free or fused at least at base; corolla 5-lobed, salverform, funnel-shaped, rotate, or bell-shaped, appendages (often called "fornices") 0 or 5 at top of tube, when present often differentially pigmented, alternate stamens; stamens epipetalous; ovary superior, 4-lobed, style 1, entire or minutely 2-lobed (2-branched). Fruit: nutlets 1--4, when > 1, all similar (often called "homomorphic") or 1 or 2 dissimilar in size and/or shape from the others (often called "heteromorphic"), free (fused), smooth to roughened, prickly or bristly or not.
Genera In Family: +- 90 genera, +- 1600--1700 species: mostly temperate, especially western North America, Mediterranean; some cultivated (Borago, Echium, Myosotis, Symphytum). Toxicity: Many genera may be TOXIC from pyrrolizidine alkaloids or accumulated nitrates. Note: Sometimes still treated in broader sense of TJM2 (e.g., APG IV 2016 Bot J Linn Soc 181:1--20), but recent evidence (Luebert et al. 2016) supports segregation, for our flora, of the families Ehretiaceae, Heliotropiaceae, Hydrophyllaceae, Lennoaceae, and Namaceae.
eFlora Treatment Author: Michael G. Simpson, C. Matt Guilliams, Kristen Hasenstab-Lehman & Ronald B. Kelley
Scientific Editor: Bruce G. Baldwin, C. Matt Guilliams, Kristen Hasenstab-Lehman, David J. Keil, Ronald B. Kelley, Robert W. Patterson, Thomas J. Rosatti & Michael G. Simpson
Genus: LappulaView DescriptionDichotomous Key


Habit: Annual, hairy, taprooted. Stem: +- erect; branches 0--many. Leaf: basal and cauline, sessile, entire. Inflorescence: raceme-like cymes, +- terminal; bracts leaf-like; pedicels erect in fruit. Flower: calyx +- deep-5-lobed, enlarged in fruit; corolla 5-lobed, funnel-shaped, appendages present; style entire. Fruit: nutlets generally 4, ovate, with +- long, barbed prickles in 1 or 2(3) rows along margins, scar lateral.
Etymology: (Latin: little bur)
eFlora Treatment Author: Ronald B. Kelley
Lappula squarrosa (Retz.) Dumort.
WAIF
Stem: 1.5--8 dm. Leaf: 2--5 cm, linear to oblong. Inflorescence: pedicel 1--3 mm. Flower: calyx 2.5--3 mm in fruit, lobes wide-linear, spreading in fruit; corolla 2--3 mm diam, blue. Fruit: nutlets 3--4 mm, marginal prickles in 2(3) rows, bases not or +- widened, not fused. Chromosomes: 2n=48.
Ecology: Moist, disturbed areas; Elevation: < 200 m. Bioregional Distribution: SCo (Santa Monica), ScV (Lodi), expected MP; Distribution Outside California: to eastern Washington, southern Idaho, northern Utah, naturalized in northern North America, Canada; native to Eurasia. Flowering Time: May--Jul Note: Last collected 1941.
Synonyms: Lappula echinata Gilib.; Lappula fremontii (Torr.) Greene
Jepson eFlora Author: Ronald B. Kelley
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

Previous taxon: Lappula redowskii var. redowskii
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Citation for this treatment: Ronald B. Kelley 2021, Lappula squarrosa, in Jepson Flora Project (eds.) Jepson eFlora, Revision 9, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=30244, accessed on April 19, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 19, 2024.

No expert verified images found for Lappula squarrosa.



Geographic subdivisions for Lappula squarrosa:
SCo (Santa Monica), ScV (Lodi), expected MP
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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).





 

Data provided by the participants of the  Consortium of California Herbaria.
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Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).