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Eragrostis lutescens
SIX-WEEKS LOVE GRASS

Higher Taxonomy
Family: Poaceae (Gramineae)View DescriptionDichotomous Key

Common Name: GRASS FAMILY
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: EragrostisView DescriptionDichotomous Key

Common Name: LOVE GRASS
Habit: Annual, perennial herb; often glandular, glands often wart-like, round, pitted. Leaf: sheath margin hairy on sides just below collar; ligules ciliate. Inflorescence: generally panicle-like, open or dense, occasionally spike-like, often glandular. Spikelet: laterally compressed; glumes +- unequal, acute or acuminate, 1(3)-veined; florets 3--many, axis breaking above glumes and between florets, or persistent, with glumes, lemmas deciduous, paleae remaining attached or not; lemma keeled or rounded, acute or obtuse, 3-veined, veins generally obvious; palea +- = lemma. Fruit: 0.4--2.4 mm, variously-shaped, occasionally longitudinally grooved, generally not noticeably compressed, generally red-brown.
Species In Genus: +- 300 species: tropics, warm temperate. Etymology: (Greek: eros, love, agrostis, a kind of grass)
eFlora Treatment Author: John R. Reeder

Eragrostis lutescens Scribn.
NATIVE
Habit: Annual. Stem: ascending or erect, 5--25(70) cm, with ring of glands below nodes; glands round, pitted. Leaf: sheath generally glabrous, +- soft-hairy near collar, veins +- glandular; ligule +- 0.5 mm; blade 2--10 cm, 1--3 mm wide, flat, folded, or inrolled, lower surface veins generally with many round glands. Inflorescence: 2--10(25) cm, erect, narrow, occasionally +- open; branches ascending or appressed, glandular. Spikelet: 2.5--7(10) mm, +- yellow, purple tinged, especially at tip; glumes acute, lower 1--1.5 mm, upper 1.5--2 mm; axis not breaking apart; florets 8--14; lemma +- 2 mm, veins prominent; palea persistent; anthers 0.2 mm, purple. Fruit: < 1 mm, elliptic, brown, not grooved.
Ecology: Sandy margins of streams, lakes; Elevation: < 1050 m. Bioregional Distribution: s SNF, SnJV; Distribution Outside California: to Washington, Colorado, Arizona. Flowering Time: Jul--Oct
eFlora Treatment Author: John R. Reeder
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botanical illustration including Eragrostis lutescens

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Citation for this treatment: John R. Reeder 2016. Eragrostis lutescens, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=24486, accessed on December 06, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on December 06, 2016.


Geographic subdivisions for Eragrostis lutescens:
s SNF, SnJV;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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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.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.