Lathyrus latifolius
{{Short description|Species of plant in the pea family}}
{{Speciesbox
| image = Lathyrus latifolius flowers.jpg
| image_caption =
| genus = Lathyrus
| species = latifolius
| authority = L.
| subdivision_ranks = Subspecies
| subdivision_ref = {{cite POWO |id=501802-1 |title=Lathyrus latifolius L. |access-date=3 July 2024}}
| subdivision = {{Species list
| Lathyrus latifolius subsp. algericus | (Ginzb.) Dobignard
| Lathyrus latifolius subsp. latifolius |
}}
| synonyms = {{Collapsible list | {{Species list
| Lathyrus sylvestris var. latifolius | (L.) Fiori (1925)
| Lathyrus sylvestris subsp. latifolius | (L.) Arcang. (1882)
| Pisum latifolium | (L.) E.H.L.Krause (1901)
}}
}}
}}
Lathyrus latifolius, the perennial peavine, perennial pea, broad-leaved everlasting-pea,{{BSBI 2007|accessdate=2014-10-17}} or just everlasting pea, is a robust, sprawling herbaceous perennial flowering plant in the pea family Fabaceae. It is native to Europe but is present on other continents, such as North America and Australia,{{cite web |url=http://www.anbg.gov.au/cgi-bin/apni?TAXON_NAME=Lathyrus+latifolius |title=Lathyrus latifolius |accessdate=20 March 2012 |work=Australian Plant Name Index (APNI), IBIS database |publisher=Centre for Plant Biodiversity Research, Australian Government, Canberra |archive-date=3 July 2022 |archive-url=https://web.archive.org/web/20220703201932/https://www.anbg.gov.au/cgi-bin/apni?TAXON_NAME=Lathyrus+latifolius |url-status=dead }} where it is most often seen along roadsides.Sierra Nevada Wildflowers, Karen Wiese, 2nd ed, 2013, p. 70
Morphology
Lathyrus latifolius has winged hairless stems, and alternating blue green compound leaves consisting of a single pair of leaflets and a winged petiole about {{convert|2|in}} long. The leaflets are narrowly ovate or oblong-ovate, smooth along the margins, hairless and up to {{cvt|3|in}} long and {{cvt|1|in}} across. There is a branched tendril between the leaflets.
= Racemes =
Short racemes of 4–11 flowers are produced from the axils of the leaves. The flowers, which are unscented, are about {{cvt|3/4–1|in}} across with a typical structure for Faboideae, with an upper standard and lower keel, enclosed by lateral petals. There are 5 petals, which are purplish pink, fading with age. There is a green calyx with 5 teeth, often unequal. The blooming period lasts about 2 months during the summer and early autumn.[http://www.illinoiswildflowers.info/weeds/plants/everlasting_pea.htm Weedy Wildflowers of Illinois: Everlasting pea]
= Seeds =
The flowers are followed by hairless flattened seedpods, about {{cvt|2|in}} long and {{cvt|1/2|in}} wide, with several seeds inside. The seedpod, which is initially green, gradually turns brown, splitting open into curled segments, flinging out the seeds. The seeds are dark and oblong to reniform in shape.
Reproduction
Lathyrus latifolius can reproduce vegetatively from its taproot and rhizomes, or by reseeding.
Cultivation and habits
Lathyrus latifolius is a perennial herbaceous vine (climber), which can reach 6 feet or more by means of twining tendrils, but in open areas sprawls. It is frost-hardy, long-lived, and slowly spreading. The foliage becomes rather ragged and yellowish by the end of summer.C. Brickell, Encyclopedia of Garden Plants, 1996, Royal Horticultural Society, London, {{ISBN|0-7513-0436-0}}.
It requires partial to full sun, and loam or clay-loam soil that is moist, mesic, or slightly dry. Unlike the related annual sweet pea, Lathyrus odoratus, with which it may be confused, it has no scent. While grown as a garden plant it may be pervasive and difficult to remove. Because of this, this species is often considered to be a weed despite its attractive appearance.
Numerous cultivars have been selected as garden subjects, of which the following have gained the Royal Horticultural Society's Award of Garden Merit:
| valign=top
| https://www.rhs.org.uk/Plants/9853/Lathyrus-latifolius/Details|publisher=Royal Horticultural Society|accessdate=30 September 2020}} (pink) https://www.rhs.org.uk/Plants/71071/Lathyrus-latifolius-Albus/Details|publisher=Royal Horticultural Society|accessdate=30 September 2020}} (white)
| accessdate=30 September 2020}} (white) |
Relations to insect life
Bumblebees pollinate the flowers. Butterflies visit the flowers for their nectar, but do not pollinate. Epicauta fabricii (Fabricius blister beetle), the caterpillars of Apantesis phyllira (Oithona tiger moth) and some herbivores feed on the leaves. However, the seeds are poisonous.
References
{{Reflist}}
External links
- {{Commons category-inline}}
- [http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?3691,3922,3940 Jepson Manual Treatment]
- [http://plants.usda.gov/java/profile?symbol=LALA4 USDA Plants Profile]
- {{GRIN}}
- [http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Lathyrus+latifolius Photo gallery]
{{Taxonbar|from=Q158325}}