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Perennial herb, glabrous; monoecious; rhizomes or stolons long; colonial, in wet soil to aquatic. Stem: aerial stem 1, ± cylindric. Leaf: basal and cauline, alternate, 2-ranked, spongy; sheath open; ligule 0; blade ± linear. Inflorescence: spike-like or of spheric, unisexual heads; staminate flowers or heads distal to pistillate ones. Flower: small, densely-packed. Staminate flower: filaments fused proximally. Pistillate flower: pistil 1, ovary superior, ovules 1–2(4). Fruit: follicle, splitting in water, or drupe-like.
2 genera, ± 32 species: worldwide. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.
Key to Typhaceae
Stem: erect, simple, cylindric, firm, air cavities 0. Leaf: ascending; blade C-shaped or planoconvex in ×-section proximally, flat distally, internal air cavities large; sheath-tip lobes present or not. Inflorescence: terminal; flowers 1000+; staminate flowers distal, mixed with many papery scales; pistillate flowers proximal, clustered on peg-like compound pedicels; bractlets many, thread-like with enlarged tips generally visible at spike surface, or 0. Staminate flower: stamens 2–7 on slender stalk; filaments slender, generally deciduous in fruit. Pistillate flower: stalk long-hairy, persistent; ovary chambers 1, style 1, persistent, stigma 1; many modified pistils with enlarged sterile ovary, style deciduous. Fruit: fusiform, thin-walled, yellow-brown, wind-dispersed.Key to Typha
± 15 species: boreal to tropics worldwide. (Greek: to smoke or emit smoke) [Smith 2000 FNANM 22:278–285] Dissecting microscope ideal for Typha identification (flower structures small), which is complicated by hybridization.
Unabridged note: Typha angustifolia × Typha latifolia (Typha × glauca Godr., pro sp.) and Typha domingensis × Typha latifolia (Typha × provincialis A. Camus) are generally highly sterile and intermediate between parents in most characters. Typha angustifolia × Typha domingensis are generally highly fertile, thus species boundaries are locally obscure. Hybrids involving 3 species are locally common. Although putative hybrids may produce no or few seeds they generally form long-persistent clones.
Plant 15–30 dm. Stem: 2–3 mm diam at inflorescence. Leaf: sheath-tip lobes ear-like, membranous, disintegrating with age; widest fresh blades 4–15 mm wide, dry 3–8 mm wide, glands 0. Inflorescence: naked stem between staminate, pistillate flowers 1–12 cm; staminate scales hair- to strap-like, brown; pistillate spike dark brown; compound pedicels short, ± blunt, peg-like in fruit, ± 0.5 mm; pistillate bractlets blunt, length = pistillate flower hairs, width >= stigma width, dark brown, generally darker than stigma. Flower: pollen grains single; stigma linear, ± white in flower, light brown in age; sterile ovary green, drying brown, visible at spike surface, reaching pistil hair tips; pistil hair tips swollen, uniformly brown.
2n=30. Nutrient-rich freshwater to brackish marshes, wet disturbed places; < 2000 m. Northwestern California, Sierra Nevada, Great Central Valley, Central Coast, San Francisco Bay Area, South Coast; to southern British Columbia, central and eastern temperate North America, Eurasia. Possibly naturalized in California. May–Aug [Online Interchange]
Unabridged note: If recognized taxonomically, hybrids with Typha latifolia assignable to Typha × glauca Godr. There is strong evidence that Typha angustifolia was introduced from Europe to the Atlantic Coast in colonial times; it has been known from California since at least 1909; it and Typha × glauca are serious invasive weeds in eastern North America.
Previous taxon: Typha
Next taxon: Typha domingensis
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 27 2015
Citation for this treatment: [Author of taxon treatment] 2013. Typha, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=47462, accessed on May 27 2015
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© 2007 Neal Kramer
|Geographic subdivisions indicated for the distribution of Typha angustifolia|| 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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(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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