Bidens lemmonii A. Gray
Family: Asteraceae
Lemmon's beggarticks,  more...
Bidens lemmonii image
Jillian Cowles  
Annuals, (10-)15-25(-30+) cm. Leaves: petioles 10-20 mm; blades either oblanceolate to linear, 5-15+ × 1-2+ mm, or rounded-deltate overall, 10-25(-60+) × 15-25+ mm, (1-)2-3-pinnatisect, ultimate lobes oblanceolate to spatulate or linear, 5-15+ × 0.5-5 mm, bases ± cuneate, ultimate margins entire, sometimes ciliolate, apices obtuse to acute, faces glabrous. Heads usually borne singly, sometimes in open, ± corymbiform arrays. Peduncles 10-20(-90) mm. Calyculi of (1-)3-4 appressed to spreading, spatulate to linear bractlets or bracts 3-10(-25+) mm (sometimes foliaceous: pinnate, lobes 3-5+, linear), margins ciliolate, abaxial faces usually glabrous, sometimes sparsely hispidulous. Involucres ± campanulate to cylindric, 2-3(-8) × 2(-3)[-4] mm. Phyllaries (3-)5, oblong to lanceolate orlinear, (2-)3-8 mm. Ray florets 0 or 1(-3+); laminae whitish, 1-1.5(-3+) mm. Disc florets (3-)5-9; corollas whitish to yellowish, 2-2.5 mm. Cypselae: outer red-brown (sometimes with lighter blotches), ± equally 4-angled, linear-fusiform, 5-6(-8) mm, margins not ciliate, apices ± attenuate, faces 2-grooved, usually glabrous; inner similar, 10-14 mm; pappi of 2-3 erect, retrorsely barbed awns 1-2(-3) mm. Flowering Sep-Oct. Wettish spots on rocky slopes; 1400-2100 m; Ariz., N.Mex.; Mexico.
FNA 2006, Kearney and Peebles 1969, Allred and Ivey 2012
Duration: Perennial Nativity: Native Lifeform: Forb/Herb General: Annual herbs, 15-25 cm high or occasionally taller. Leaves: Opposite, on petioles 1-2 cm long; blades 2-3 times pinnately lobed, the ultimate lobes linear, 1-5 mm wide, glabrous, the margins sometimes ciliate. Flowers: Flower heads yellow, radiate or discoid, subsessile or on short 1-2(-9) cm peduncles, usually solitary but sometimes arranged in open, flat-topped panicles; calyculi (extra set of bracts just below the involucre) of 3-4 appressed to spreading, linear or pinnately lobed bractlets, 3-25 mm long; involucre (ring of bracts wrapped around the flower head) campanulate to cylindric, to 3 mm or more high and shorter than the calyculi, the bracts (phyllaries) 5, lanceolate; ray flowers absent or up to 3, the corolla laminae (ray petals) whitish, 2 mm long; disc flowers 5-9, the corollas yellow to whitish, 2 mm high. Fruits: Achenes red-brown, linear, 4-angled, faces 2-grooved, margins not ciliate, with a pappus of 2-3 erect, retrorsely barbed awns, 1-2 mm long. Ecology: Found in moist microclimates on rocky slopes, from 4,500-7,000 ft (1372-2134 m); flowers September-October. Distribution: s AZ, s NM; south to MEX. Notes: Bidens is a genus of herbaceous plants with opposite leaves, discoid or radiate flower heads with yellow-orange flowers, and seeds (achenes) with 2-4 barbed awns. Good indicators for B. lemmonii are the subsessile or short-peduncled heads (B. leptocephala has longer peduncles, 3-8 cm long); the ray flowers which are often missing but when present are white (most Bidens spp. have yellow rays); the leaves with linear or linear-oblong leaf lobes 1-3 mm wide (B. bigelovii has wider leaf lobes); and the calyculi (outer bractlets of flower head) longer than the involucre (the calyculi bractlets are only 1-3 mm long and shorter than the involucre in B. leptocephala). Ethnobotany: Unknown for this species, others in genus have many uses. Etymology: Bidens is derived from the Latin bis, twice and dens, tooth, hence meaning 2-toothed, while lemmonii is named for Sara Plummer Lemmon (1836-1923) and her husband John Gil Lemmon (1832-1908), who collected plants for Asa Gray all across the west. Synonyms: None Editor: LCrumbacher 2011, AHazelton 2015
Bidens lemmonii image
Jillian Cowles  
Bidens lemmonii image
Bidens lemmonii image
Sue Carnahan  
Bidens lemmonii image
Sue Carnahan  
Bidens lemmonii image
Bidens lemmonii image
Bidens lemmonii image
Bidens lemmonii image
Bidens lemmonii image