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Leptochloa fusca subsp. uninervia

Higher Taxonomy
Family: Poaceae (Gramineae)View DescriptionDichotomous Key
Habit: Annual to woody perennial herb; roots generally fibrous. Stem: generally round, hollow; nodes swollen, solid. Leaf: alternate, 2-ranked, generally linear, parallel-veined; sheath generally open; ligule membranous or hairy, at blade base. Inflorescence: various (of generally many spikelets). Spikelet: glumes generally 2; florets (lemma, palea, flower) 1--many; lemma generally membranous, sometimes glume-like; palea generally +- transparent, +- enclosed by lemma. Flower: generally bisexual, minute; perianth vestigial; stamens generally 3; stigmas generally 2, generally plumose. Fruit: grain, sometimes achene- or utricle-like.
Genera In Family: 650--900 genera; +- 10550 species: worldwide; greatest economic importance of any family (wheat, rice, maize, millet, sorghum, sugar cane, forage crops, ornamental, weeds; thatching, weaving, building materials). Note: Generally wind-pollinated. Achnatherum, Ampelodesmos, Hesperostipa, Nassella, Piptatherum, Piptochaetium, Ptilagrostis moved to Stipa; Elytrigia, Leymus, Pascopyrum, Pseudoroegneria, Taeniatherum to Elymus; Hierochloe to Anthoxanthum; Lolium, Vulpia to Festuca; Lycurus to Muhlenbergia; Monanthochloe to Distichlis; Pleuraphis to Hilaria; Rhynchelytrum to Melinis. The following taxa (in genera not included here), recorded in California from historical collections or reported in literature, are extirpated, lacking vouchers, or not considered naturalized: Acrachne racemosa (Roth) Ohwi, Allolepis texana (Vasey) Soderstr. & H.F. Decker, Amphibromus nervosus (Hook. f.) Baill., Axonopus affinis Chase, Axonopus fissifolius (Raddi) Kuhlm., Coix lacryma-jobi L., Cutandia memphitica (Spreng.) K. Richt., Dinebra retroflexa (Vahl) Panz., Eremochloa ciliaris (L.) Merr., Eustachys distichophylla (Lag.) Nees, Gaudinia fragilis (L.) P. Beauv., Miscanthus sinensis Andersson, Neyraudia arundinacea (L.) Henrard, Phyllostachys aurea Rivière & C. Rivière, Phyllostachys bambusoides Siebold & Zuccarini, Rottboellia cochinchinensis (Lour.) Clayton, Schedonnardus paniculatus (Nutt.) Branner & Coville, Schizachyrium cirratum (Hack.) Wooton & Standl., Schizachyrium scoparium (Michx.) Nash, Themeda quadrivalvis (L.) Kuntze, Thysanolaena latifolia (Hornem.) Honda, Tribolium obliterum (Hemsl.) Renvoize, Zea mays L., Zizania palustris L. var. interior (Fassett) Dore, Zoysia japonica Steud. Paspalum pubiflorum E. Fourn., Paspalum quadrifarium Lam., are now reported for southern California (J Bot Res Inst Texas 4:761--770). See Glossary p. 30 for illustrations of general family characteristics.
eFlora Treatment Author: James P. Smith, Jr., except as noted
Scientific Editor: James P. Smith, Jr., J. Travis Columbus, Dieter H. Wilken.
Genus: LeptochloaView DescriptionDichotomous Key

Habit: Annual, perennial herb. Stem: spreading to erect. Leaf: generally cauline; ligule membranous, +- entire to jagged, sometimes ciliate; blade flat. Inflorescence: panicle-like; branches spike- or raceme-like; spikelets short-stalked or sessile. Spikelet: laterally compressed or +- cylindrical; glumes equal or not, 1(3)-veined, short-awned or not; axis breaking apart above glumes and between florets; florets generally 2--12; lemma back rounded or keeled, glabrous or hairy, 3-veined, tip obtuse or minutely 2-lobed, awn generally 0; stamens 1--3.
Species In Genus: 32 species: warm temperate, tropics. Etymology: (Greek: slender grass, from slender inflorescence)
eFlora Treatment Author: James P. Smith, Jr.
Reference: Snow 2003 FNANM 25:51--60; McNeill 1979 Brittonia 31:399--404
Species: Leptochloa fuscaView Description 

Habit: Annual. Stem: decumbent to erect; internodes hollow. Leaf: sheath glabrous or scabrous; ligule membranous; blade 10--55 cm, 1--7 mm wide, glabrous or scabrous, long-tapered to a fine tip, upper exceeding panicles or not. Inflorescence: 0.7--7 dm, <= 20 cm wide, branches 3--35, lower sometimes enclosed in upper sheath. Spikelet: +- round in ×-section, lower glume < upper; lemma midvein ciliate, margin soft-hairy, tip acute to truncate, mucronate or 1-awned, back rounded; palea back pubescent, hairy on margins; stamens 1--3. Chromosomes: 2n=20.
Note: Leptochloa fusca subsp. fusca found once (1983, Butte Co.), but presumed extirpated.
Leptochloa fusca subsp. uninervia (J. Presl) N. Snow
Stem: erect, 3--10 dm, sometimes few-branched. Leaf: sheath glabrous or scabrous; ligule 2--6 mm, entire to jagged with age. Inflorescence: 1--7 dm; branches generally ascending, lower 3--6 cm. Spikelet: 5--7 mm; glumes 1--2 mm, upper > and wider than lower; florets 6--9; lemma 2--3 mm, tip obtuse to truncate, mucronate, awn 0. Chromosomes: 2n=20.
Ecology: Ditches, drying ponds, disturbed wet areas; Elevation: generally < 1000 m. Bioregional Distribution: s SNF, GV, CW, SW, GB, D; Distribution Outside California: to southern United States, Mexico, South America. Flowering Time: Mar--Dec
Synonyms: Leptochloa uninervia (J. Presl) Hitchc. & Chase
Jepson eFlora Author: James P. Smith, Jr.
Reference: Snow 2003 FNANM 25:51--60; McNeill 1979 Brittonia 31:399--404
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Citation for this treatment: James P. Smith, Jr. 2012, Leptochloa fusca subsp. uninervia, in Jepson Flora Project (eds.) Jepson eFlora, /eflora/eflora_display.php?tid=80527, accessed on August 04, 2020.

Citation for the whole project: Jepson Flora Project (eds.) 2020, Jepson eFlora,, accessed on August 04, 2020.

Leptochloa fusca subsp. uninervia
click for enlargement
© 2019 Neal Kramer
Leptochloa fusca subsp. uninervia
click for enlargement
© 2019 Neal Kramer
Leptochloa fusca subsp. uninervia
click for enlargement
© 2012 Keir Morse
Leptochloa fusca subsp. uninervia
click for enlargement
© 2019 Neal Kramer
Leptochloa fusca subsp. uninervia
click for enlargement
© 2012 Keir Morse
Leptochloa fusca subsp. uninervia
click for enlargement
© 2019 Neal Kramer

More photos of Leptochloa fusca subsp. uninervia in CalPhotos

Geographic subdivisions for Leptochloa fusca subsp. uninervia:
s SNF, GV, CW, SW, GB, D
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map of distribution 1
(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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Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).