Difference between revisions of "Digitaria hitchcockii"
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name=Digitaria hitchcockii | name=Digitaria hitchcockii | ||
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|authority=(Chase) Stuck. | |authority=(Chase) Stuck. | ||
|rank=species | |rank=species | ||
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|basionyms= | |basionyms= | ||
|family=Poaceae | |family=Poaceae | ||
| + | |illustrator=Linda A. Vorobik;Hana Pazdírková | ||
| + | |illustration copyright=Utah State University | ||
|distribution=Virgin Islands;Tex. | |distribution=Virgin Islands;Tex. | ||
|reference=None | |reference=None | ||
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|publication year= | |publication year= | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V25/V25_1064.xml |
|subfamily=Poaceae subfam. Panicoideae | |subfamily=Poaceae subfam. Panicoideae | ||
|tribe=Poaceae tribe Paniceae | |tribe=Poaceae tribe Paniceae | ||
Latest revision as of 18:55, 11 May 2021
Plants perennial; rhizomatous, rhizomes short, giving the plants hard, knotty, much-branched bases. Culms 20-55 cm, erect, sometimes geniculate, not rooting at the lower nodes. Basal sheaths tomentose; culm sheaths glabrous or variously pubescent (puberulent, ciliate, or sparsely hirsute); ligules (0.1)0.5-1(1.5) mm, ciliate; blades 2-5.5 cm long, 2-3 mm wide. Panicles with 3-6 spikelike primary branches on 6-10(15) cm rachises; primary branches 1-6 cm, not or only narrowly winged, bearing spikelets in unequally pedicellate pairs, pedicels not adnate to the branch axes; shorter pedicels 1.5-2 mm; longer pedicels 3-4 mm. Spikelets homomorphic, 2.5-3.1 mm (including pubescence), 2.4-3 mm (excluding pubescence). Lower glumes 0.3-1 mm, veinless; upper glumes 2.1-3 mm (including pubescence), as long as or exceeding the upper florets by no more than 0.5 mm, 3-veined, densely appressed-pubescent, hairs 0.5-1 mm, white to purple, tapering or parallel-sided, not spreading at maturity; lower lemmas 2.3-3.1 mm (including pubescence), as long as or exceeding the upper lemmas by up to 0.5 mm, 5-veined, veins equally spaced, intercostal regions densely appressed-pubescent, hairs 0.5-1 mm, white to purple, tapering or parallel-sided, not spreading at maturity; upper lemmas 2.2-2.5 mm, brown when immature, dark brown at maturity. Caryopses 2.1-3.4 mm. 2n = 36.
Distribution
Virgin Islands, Tex.
Discussion
Digitaria hitchcockii is an uncommon species of open, dry, gravelly slopes in southwestern Texas and northern Mexico.
Selected References
None.