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Neostapfia colusana
COLUSA 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: NeostapfiaView Description 



Etymology: (O. Stapf, British botanist, 1857--1933)
eFlora Treatment Author: John R. Reeder
Reference: Reeder 2003 FNANM 25:294--295
Unabridged Reference: Reeder 1982 Amer J Bot 69:1082--1095
Neostapfia colusana (Burtt Davy) Burtt Davy
NATIVE
Habit: Annual, cespitose, brown-sticky-glandular with age. Stem: ascending, 1--3 dm. Leaf: collar 0; sheath and blade continuous, base loosely enclosing stem; blade 5--12 mm wide. Inflorescence: 2--8 cm, 8--12 mm wide, spike-like, cylindric, dense; spikelets spirally arranged along axis; axis generally prolonged above spikelets, naked or with small scales. Spikelet: glumes 0; lemma flat, +- fan-shaped, strongly 7--11-veined; florets generally 5, axis breaking between florets; lower lemmas +- 5 mm, +- translucent between veins, finely ciliate; palea +- = lemma; anthers +- 2.5 mm. Fruit: generally 2.5 mm. Chromosomes: 2n=40.
Ecology: Vernal pools; Elevation: < 125 m. Bioregional Distribution: GV (Colusa, Merced, Solano, Stanislaus cos.). Flowering Time: May--Aug Note: Inflorescence resembles miniature ears of corn.
Jepson eFlora Author: John R. Reeder
Reference: Reeder 2003 FNANM 25:294--295
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Listed on CNPS Rare Plant Inventory

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Botanical illustration including Neostapfia colusana

botanical illustration including Neostapfia colusana

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Citation for this treatment: John R. Reeder 2012, Neostapfia colusana, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=34576, accessed on April 19, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 19, 2024.

Neostapfia colusana
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©2012 Aaron E. Sims
Neostapfia colusana
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©2004 Carol W. Witham
Neostapfia colusana
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©2012 Aaron E. Sims
Neostapfia colusana
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©2012 Aaron E. Sims
Neostapfia colusana
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©1999 John Game

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Geographic subdivisions for Neostapfia colusana:
GV (Colusa, Merced, Solano, Stanislaus cos.).
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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).





 

Data provided by the participants of the  Consortium of California Herbaria.
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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.
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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).