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Digitaria bicornis

(Lam.) Roem. & Schult. (1817)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Monocots Order: Poales Family: Poaceae Genus: Digitaria

dimophic crabgrass

Description

Key Characters:

Growth Form:

Stems:

Roots:

Leaves:

Flowers:

Fruit:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

Kaua'i Potentially naturalizing
O'ahu Potentially naturalizing
Molokai Potentially naturalizing
Maui Naturalized

Dispersal Agents


Pollinators

Bibliography

Name Published In: Syst. Veg., ed. 15 bis 2: 470 (1817)

Other References

Snow & Lau 2010:50 (NEWNAT/WM, DESCR); Imada & Kennedy 2020:81 (Mi, EM); Faccenda 2022:55 (Le, K, DESCR, remove Mi [re-IDed as D. ciliaris]); Faccenda 2023c:101, 110 (O, Mo, KEY)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Digitaria bicornis Piilani Hwy ca. 12 km W of Kaupo Roadside weed in disturbed area in full sun Preserved_Specimen Uncommon along this road, florets with strongly dimorphic pubescence, easily recognized as distinct from D. ciliaris Faccenda, K. 2803 Maui BISH 2022-10-26
2 Digitaria bicornis Kaunakakai, Mahalo Pl. at end of road Outside house in unmaintained area, rather sunny and somewhat moist Preserved_Specimen Only one plant seen in this area, but it was only surveyed very briefly Faccenda, K. 2977 Molokai BISH 2022-12-30
3 Digitaria bicornis W Maui, Waikapu, near the Hibiscus brackenridgei exclosure On dirt pasture rd. Associated vegetation: Wiliwili, haole koa, Panicum maximum. Preserved_Specimen Decumbent, semi-erect grass <½m ht; rachis winged, spikelets in pairs?, second glume 2/3 as long as spikelet? Starr, F. 201121 Maui BISH 2002-01-12
4 Digitaria bicornis W Maui, Wailuku Distr., Waikapu, foot of Kaunoahua Ridge Occasional in weedy area formerly pasture, in Prosopis/Cenchrus with remnant Erythrina. Preserved_Specimen Oppenheimer, H.L. 40921 Maui BISH 2009-04-17
5 Digitaria bicornis Eastern end of University of Hawaii West O'ahu Campus Open, weedy, undeveloped area, full sun, dry Preserved_Specimen 100-200 plants here, population was about 10 m in diameter Faccenda, K. 3068 Oahu BISH 2023-03-13
6 Digitaria bicornis Along Haleakala Hwy Growing on mowed rd shoulder. Preserved_Specimen Seeds extremely hairy along marginal nerves. Hobdy, R.W. 1385 Maui BISH 1982-05-07
7 Digitaria bicornis Kaupo, Piilani Hwy., ca. 2 km W of Kaupo town Roadside weed along edge of pasture Preserved_Specimen Uncommon along road in sunny areas, most other plants did not have the inflorescence branches contracted together like this patch did however Faccenda, K. 2796 Maui BISH 2022-10-26
8 Digitaria bicornis Barking Sands, Pacific Missile Range Facility, U. S. Navy. Along main rd betw Kokole Pt & base housing Preserved_Specimen Flynn, T.W. 2701 Kauai BISH 1988-01-18
9 Digitaria bicornis West Maui, Lahaina District, Alaeloa, 120 ft. growing adjacent to building at Maui Pineapple Co. baseyard Preserved_Specimen Plants with stolons. Oppenheimer, H.L. 90302 Maui BISH 2003-09-04
10 Digitaria bicornis Bishop Museum Campus, behind buildings along Kalihi St Sunny dry waste area. One plant Preserved_Specimen Leaves bluish green Faccenda, K. 2004 Oahu BISH 2021-06-24
11 Digitaria bicornis West Maui, Wailuku, Waikapu, Kaunoahua old pasture Preserved_Specimen Oppenheimer, H.L. 20816 Maui BISH 2008-02-25
12 Digitaria bicornis Waikapu, W. Waiko Rd Roadside weed in moist area Preserved_Specimen Common, spikelets dimorphic Faccenda, K. 2724 Maui BISH 2022-10-21
13 Digitaria bicornis Nahua, Papaanui Beach Park Preserved_Specimen Herbst, D.R. 5399 Maui BISH 1975-07-07
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