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Tuctoria mucronata
CRAMPTON'S TUCTORIA, SOLANO 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: TuctoriaView DescriptionDichotomous Key

Habit: Annual, +- hairy. Stem: ascending to erect, unbranched, often fragile, easily breaking apart at nodes. Leaf: basal and cauline; collar 0; sheath and blade continuous; blade flat or becoming inrolled when dry. Inflorescence: spike-like, partly enclosed by upper sheath or exserted with age; spikelets spirally arranged on axis. Spikelet: laterally compressed; glumes entire or irregularly short-toothed; florets 5--40, tardily breaking above glumes and between florets; lemma entire or minutely toothed, generally with central sharp point, 11--17-veined; palea +- = lemma; anthers exserted, filaments slender, ribbon-like; stigmas 1/3--1/2 style length, sparsely short-hairy. Fruit: obovoid or oblong.
Species In Genus: 3 species: California, southern Baja California. Etymology: (Anagram of Orcuttia)
eFlora Treatment Author: John R. Reeder

Tuctoria mucronata (Crampton) Reeder
NATIVE
Stem: ascending, becoming decumbent, < 12 cm. Leaf: 2--4 cm, curved outward, inrolled, tapered to fine point. Inflorescence: 1.5--6 cm; spikelets crowded. Spikelet: glumes 4--7 mm, subequal, short-pointed, sometimes with 1 or 2 short lateral teeth; florets 5--10; lemma 5--7 mm, 11--15-veined, central vein ending in a sharp point < 1 mm; anthers +- 3 mm, yellow, drying +- pink. Fruit: laterally flattened, widely oblong. Chromosomes: 2n=40.
Ecology: Vernal pools, grassland; Elevation: < 10 m. Bioregional Distribution: sw ScV (Solano, Yolo cos.). Flowering Time: Apr--Aug
Synonyms: Orcuttia mucronata Crampton
eFlora Treatment Author: John R. Reeder
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botanical illustration including Tuctoria mucronata

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Citation for this treatment: John R. Reeder 2016. Tuctoria mucronata, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=47432, accessed on December 04, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on December 04, 2016.


Tuctoria mucronata
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© 2012 Aaron E. Sims
Tuctoria mucronata
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© 2012 Aaron E. Sims
Tuctoria mucronata
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© 2004 Carol W. Witham
Tuctoria mucronata
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© 1999 John Game
Tuctoria mucronata
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© 2012 Aaron E. Sims
Tuctoria mucronata
click for enlargement
© 2012 Aaron E. Sims

More photos of Tuctoria mucronata in CalPhotos


Geographic subdivisions for Tuctoria mucronata:
sw ScV (Solano, Yolo cos.).
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.