Hesperomecon lineare

• Interesting Facts
• Description
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Interesting Facts

Description

Family Papaveraceae

Herbs or subshrubs , shrubs , or small trees , annual , biennial, or perennial , scapose or caulescent , usually from taproots , sometimes from rhizomes; sap clear, white, or colored , often sticky. Stems leafy or naked, erect , spreading , or decumbent , simple or branching. Leaves basal and/or cauline, alternate to opposite or whorled , simple, without stipules, petiolate or sessile; blade unlobed or with 1-3 odd-pinnate, subpalmate, or palmate orders of lobes . Inflorescences axillary or terminal , unifloral or else multifloral and cymiform, racemose, umbelliform, corybiform, or paniculate , pedunculate or subsessile ; bracts usually present. Flowers radially symmetric , pedicellate or sessile; receptacle sometimes expanded and forming cup or ring beneath calyx (only in Eschscholzia, Meconella, and Platystemon ) ; perianth and androecium sometimes perigynous; sepals caducous , 2 or 3, distinct or connate , usually obovate ; petals distinct, usually obovate, mostly 2 times number of sepals, sometimes more or absent; stamens many or 4-15 (only in Meconella and Canbya ) ; anthers 2-locular; pistil 1, 2-18[-22]-carpellate; ovary 1-2-locular or incompletely to completely multilocular by placental intrusion; placentas 2 or more, parietal ; style 1 or absent; stigmas or stigma lobes 2-many. Fruits capsular , dehiscence valvate , poricidal , or transverse , or carpels dissociating and breaking transversely into 1-seeded segments (only in Platystemon ) . Seeds usually many, small, sometimes arillate or carunculate.

Genera 25-30 (17 genera, 63 species in the flora ) : worldwide, mainly Northern Hemisphere.

According to W. R. Ernst (1962b), Papaveraceae "may be divided conveniently into four subfamilies." His scheme is followed here, but with the subfamilies taken up in alphabetic order; they seem to be natural groups, but their phylogenetic interrelationships are not yet clear. Similarly, the evolutionary relationships within the subfamilies remain ambiguous, and the genera in each are listed alphabetically. Subfamily Chelidonioideae Ernst includes genera 1-5; subf. Eschscholzioideae Ernst, genera 6-7; subf. Papavaroideae Ernst, genera 8-14; and subf. Platostamenoideae Ernst, genera 15-17.[1]

Genus Hesperomecon

Herbs annual , short-caulescent, subscapose , distinctly pubescent , from fibrous roots ; sap clear. Stems leafy at and near base , erect , branching from base. Leaves opposite, sessile; blade broadly linear , unlobed. Inflorescences axillary or terminal , 1-flowered; bracts absent; bud nodding . Flowers: sepals 3, with overlapping, loosely connivent flaps; petals 6, occasionally more on robust specimens; stamens 12 or more, usually in several series; filaments dilated distally; pistil 3-carpellate; ovary 1-locular; stigmas 3. Capsules erect, 3-valved, dehiscing from apex. Seeds many, aril absent. x = 7.

Species 1: Calif.[2]

Taxonomy

Notes

Publishing author : Greene Publication : Pittonia 5: 146 1903

Similar Species

Members of the genus Hesperomecon

ZipcodeZoo has pages for 0 species, subspecies, varieties, forms, and cultivars in this genus:

More Info

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Further Reading

• An illustrated flora of the Pacific States: Washington, Oregon, and California. Stanford University, Stanford University Press, 1923-[60] url p. 225.
• Bulletin of the Southern California Academy of Sciences. Los Angeles, Calif.: The Academy, 1902-1971. url p. 109.
• Ernst, W. R. 1962. A Comparative Morphology of the Papaveraceae. Ph.D. dissertation. Stanford University.
• Ernst, W. R. 1962b. The genera of Papaveraceae and Fumariaceae in the southeastern United States. J. Arnold Arbor. 43: 315-343.
• Ernst, W. R. 1967. Floral morphology and systematics of Platystemon and its allies Hesperomecon and Meconella (Papaveraceae: Platystemonoideae). Univ. Kansas Sci. Bull. 47: 25-70.
• Fedde, F. 1936. Papaveraceae. In: H. G. A. Engler et al., eds. 1924+. Die natürlichen Pflanzenfamilien, ed. 2. 26+ vols. Leipzig and Berlin. Vol. 17b, pp. 5-145.
• Fedde, F. 1909. Papaveraceae-Hypecoideae et Papaveraceae-Papaveroideae. In: H. G. A. Engler, ed. 1900-1953. Das Pflanzenreich. 107 vols. Berlin. Vol. 40[IV,104], pp. 1-430.
• Grey-Wilson, C. 1993. Poppies: A Guide to the Poppy Family in the Wild and in Cultivation. Portland.
• Gunn, C. R. 1980. Seeds and fruits of Papaveraceae and Fumariaceae. Seed Sci. Techn. 8: 3-58.
• Gunn, C. R. and M. J. Seldin. 1976. Seeds and Fruits of North American Papaveraceae. Washington. [U.S.D.A. Agric. Res. Serv., Techn. Bull. 1517.]
• Harms, H. 1936. Reihe Rhoeadales. In: H. G. A. Engler et al., eds. 1924+. Die natürlichen Pflanzenfamilien, ed. 2. 26+ vols. Leipzig and Berlin. Vol. 17b, pp. 1-4.
• Hutchinson, J. 1925. Contributions towards a phylogenetic classification of flowering plants: V. The genera of Papaveraceae. Bull. Misinform. Kew 1925: 161-168.
• Kadereit, J. W. 1993. Papaveraceae. In: K. Kubitzki et al., eds. 1990+. The Families and Genera of Vascular Plants. 2+ vols. Berlin etc. Vol. 2, pp. 494-506.
• Stermitz, F. R. 1968. Alkaloid chemistry and the systematics of Papaver and Argemone. Recent Advances Phytochem. 1: 161-183.

Notes

Contributors

• Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 16, 2012.

Identifiers

• Biodiversity Heritage Library NamebankID: 10742220
• Global Biodiversity Information Facility Taxonkey: 15727135
• Globally Unique Identifier: urn:lsid:ipni.org:names:673215-1
• Zipcode Zoo Species Identifier: 1360140

Footnotes

1. Robert W. Kiger "Papaveraceae". in Flora of North America Vol. 3. Oxford University Press. Online at EFloras.org. [back]
2. Gary L. Hannan "Hesperomecon". in Flora of North America Vol. 3. Oxford University Press. Online at EFloras.org. [back]

©2004-2012 David Stang. All rights reserved.