Difference between revisions of "Agrostis stolonifera"

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Vigosa-Mercado J, Delgado-Salinas A, Alvarado Cárdenas L, Eguiarte L (2023) Revision of the genus Agrostis (Poaceae, Pooideae, Poeae) in Megamexico. PhytoKeys 230 : 157–256, doi. Versioned wiki page: 2023-08-11, version 197565, https://species-id.net/w/index.php?title=Agrostis_stolonifera&oldid=197565 , contributors (alphabetical order): Pensoft Publishers.

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BibTeX:

@article{Vigosa-Mercado2023PhytoKeys230,
author = {Vigosa-Mercado, J. Luis AND Delgado-Salinas, Alfonso AND Alvarado Cárdenas, Leonardo O. AND Eguiarte, Luis E.},
journal = {PhytoKeys},
publisher = {Pensoft Publishers},
title = {Revision of the genus Agrostis (Poaceae, Pooideae, Poeae) in Megamexico},
year = {2023},
volume = {230},
issue = {},
pages = {157--256},
doi = {10.3897/phytokeys.230.105878},
url = {https://phytokeys.pensoft.net/articles.php?id=105878},
note = {Versioned wiki page: 2023-08-11, version 197565, https://species-id.net/w/index.php?title=Agrostis_stolonifera&oldid=197565 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - Revision of the genus Agrostis (Poaceae, Pooideae, Poeae) in Megamexico
A1 - Vigosa-Mercado J
A1 - Delgado-Salinas A
A1 - Alvarado Cárdenas L
A1 - Eguiarte L
Y1 - 2023
JF - PhytoKeys
JA -
VL - 230
IS -
UR - http://dx.doi.org/10.3897/phytokeys.230.105878
SP - 157
EP - 256
PB - Pensoft Publishers
M1 - Versioned wiki page: 2023-08-11, version 197565, https://species-id.net/w/index.php?title=Agrostis_stolonifera&oldid=197565 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/phytokeys.230.105878

Wikipedia/ Citizendium:

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| author = Vigosa-Mercado J, Delgado-Salinas A, Alvarado Cárdenas L, Eguiarte L
| title = Revision of the genus Agrostis (Poaceae, Pooideae, Poeae) in Megamexico
| journal = PhytoKeys
| year = 2023
| volume = 230
| issue =
| pages = 157--256
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/phytokeys.230.105878
| url = https://phytokeys.pensoft.net/articles.php?id=105878
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}} Versioned wiki page: 2023-08-11, version 197565, https://species-id.net/w/index.php?title=Agrostis_stolonifera&oldid=197565 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Poales
Familia: Poaceae
Genus: Agrostis

Name

Agrostis stolonifera L., Sp. Pl. 1: 62. 1753. – Wikispecies link – Pensoft Profile

Type

Herb. A. van Royen s.n. (lectotype, designated by Widén (1971[1]: 77): L (L0059234 [image!])).

Description

Plants perennial, stoloniferous. Tillers extravaginal, with cataphylls. Stolons up to 1(–2) m long. Culms (8–)15–60 cm long, erect, decumbent at the base, nodes (2–)3–7, glabrous, lower nodes rooting, internodes glabrous. Leaves mostly cauline; sheaths 2.5–8 cm long, usually shorter than the internodes, glabrous or scaberulous; ligules 1–7 mm long, longer than wide, dorsally scaberulous, apices rounded to truncate, erose to lacerate; blades (1–)2–10 cm long, (1–)2–6 mm wide, linear, flat, becoming convolute when dry scaberulous on both surfaces. Panicles (3–)4–20 cm long, 0.5–3 cm wide, open at anthesis, becoming contracted, dense, lanceolate, sometimes spiciform; branches appressed to ascending, branching from below mid-length, scaberulous, inferior branches 2–6 cm long, lateral branches often with spikelets near their base; pedicels 0.5–3.3 mm long, appressed to ascending, scaberulous. Spikelets 1.6–2 (–3) mm long, greenish, often tinged with purple; glumes subequal to unequal, lanceolate, apices acute to shortly acuminate, 1-veined, scaberulous on the keel, lower glume 1.6–2 (–3) mm long, upper glume 1.4–2(1.6–2 (–3) mm long; callus puberulous, with 2 bunches of short trichomes, sometimes inconspicuous; lemmas 1.4–2 mm long, elliptic to oblong, apices entire, acute to obtuse, sometimes toothed, 3(5)-veined, veins inconspicuous or prominent distally, unawned, rarely awned from above mid-length, awn up to 1.5 mm long, inserted 0.8–1.5 mm above the base, straight or weakly geniculate; paleas present, 0.7–1.4 mm long, 2-veined, glabrous; anthers 3, 0.9–1.5 mm long. Caryopsis 0.9–1.3, elliptic; endosperm solid. 2n= 28, 35, 42 (Harvey 2007[2]).

Anatomy and micromorphology

Leaf blades flat to convolute in transversal section; adaxial furrows medium-sized to deep, wide; adaxial ribs rounded; keel absent; first order bundles circular to slightly elliptical in outline, sheath interrupted adaxially and abaxially, abaxial and adaxial sclerenchyma in girders, narrowing towards the bundle; second order bundles circular in outline, sheath interrupted abaxially, abaxial and adaxial sclerenchyma in strands; intercostal sclerenchyma absent; leaf margins with well-developed sclerenchyma caps, rounded; colorless cells absent (Fig. 31D, E). Lemmas without transversal thickenings, prickle hairs abundant to scarce (Fig. 32B).

Distribution and habitat

Introduced. Agrostis stolonifera is native to Eurasia and northern North America (Harvey 2007[2]). In the study zone, this taxon has been collected from the Mexican states of Baja California and Veracruz (Fig. 26C). Agrostis has also been reported from the southern United States and Mexico City, also from the states of Chiapas, Chihuahua, Coahuila, Hidalgo, Jalisco, México, Michoacán, Nuevo León, Puebla, and Tlaxcala (Dávila et al. 2018[3]; Sánchez-Ken 2019[4]), but no specimens from these states have been seen. This taxon has been collected on stream edges and open areas of pine forests, between 1800–2100 m a.s.l. (Fig. 27C). There are more records of this species in the study zone, on databases (GBIF 2023d[5]), but not all of them have images, and thus we were unable to confirm their identity.

Phenology

Specimens with spikelets have been collected from June to August (Fig. 28C).

Commentaries

Agrostis stolonifera is often confused with A. gigantea (see the note under the description of that species). This is a variable species and several infraspecific taxa have been recognized (e.g., Pohl and Davidse 1994[6]; Rúgolo and Molina 1997[7]). The plants from the study zone fit well in A. stolonifera var. palustris, which is distinguished from the typical variety in the more contracted panicles, up to 3 cm wide, and smaller spikelets of 1.6–2 mm long (vs. more open panicles, up to 6 cm wide, spikelets 2–2.5 mm long in the typical variety). The width of the panicles could be related to the age of the panicles, since they become contracted after anthesis, and thus varieties are not recognized here.
This taxon is also confused with Polypogon viridis (Gouan) Breistr., from which it is distinguished in the spikelets disarticulating above the glumes (vs. disarticulation below the glumes, with a pedicel fragment in P. viridis).

Conservation status

Since Agrostis stolonifera is an introduced taxon in the study zone, its conservation status is considered as Least Concern (LC).

Specimens examined

Mexico. Baja California: Municipio Ensenada, Sierra San Pedro Mártir, La Grulla, [30.88916°N, 115.46223°W], 2100 m alt., 21 Aug 1967, R. Moran and R.F. Thorne 14466 (SD). Veracruz: Municipio Tatatila, camino Las Vigas–Tatatila, 1 km antes de La Mancuerna, 19.675°N, 97.125°W, 1800 m alt., 7 Jun 1996, H.R. Sandoval and B.V. Hernández 370 (CIB), 380 (CIB, MEXU [*, **], XAL).

Taxon Treatment

  • Vigosa-Mercado, J; Delgado-Salinas, A; Alvarado Cárdenas, L; Eguiarte, L; 2023: Revision of the genus Agrostis (Poaceae, Pooideae, Poeae) in Megamexico PhytoKeys, 230: 157-256. doi

Images

Figure 4. Florets of Agrostis species observed with SEM AA. bourgaeiBA. calderoniaeCA. capillarisDA. elliottianaEA. exarataFA. ghiesbreghtiiGA. giganteaHA. hyemalisIA. laxissimaJA. microphyllaKA. pallensLA. perennansMA. scabraNA. stoloniferaOA. subpatensPA. subrepensQA. tolucensisRA. turrialbaeSA. variabilis. Scale bars: 0.3 mm.
Figure 26. Map of known geographic distribution of Agrostis species, based on herbarium specimen data AA. perennansBA. scabraCA. stoloniferaDA. subpatensEA. subrepensFA. tolucensis.
Figure 26. Map of known geographic distribution of Agrostis species, based on herbarium specimen data AA. perennansBA. scabraCA. stoloniferaDA. subpatensEA. subrepensFA. tolucensis. 
Figure 27. Elevation histograms of Agrostis species AA. perennansBA. scabraCA. stoloniferaDA. subpatensEA. subrepensFA. tolucensisGA. turrialbaeHA. variabilis.
Figure 28. Phenology histograms of Agrostis species AA. perennansBA. scabraCA. stoloniferaDA. subpatensEA. subrepensFA. tolucensisGA. turrialbaeHA. variabilis.
Figure 30. Calluses of Agrostis species observed with SEM AA. scabraBA. stoloniferaCA. subpatensDA. subrepensEA. tolucensisFA. turrialbaeGA. variabilis. Scale bars: 50 μm.
Figure 30. Calluses of Agrostis species observed with SEM AA. scabraBA. stoloniferaCA. subpatensDA. subrepensEA. tolucensisFA. turrialbaeGA. variabilis. Scale bars: 50 μm. 
Figure 31. Leaf blade anatomy in transversal section of Agrostis species, in general view, and details of lateral bundles. A–CA. scabraD–EA. stoloniferaF–GA. subpatensH–IA. subrepens. Scale bars: 0.1 mm.
Figure 31. Leaf blade anatomy in transversal section of Agrostis species, in general view, and details of lateral bundles. A–CA. scabraD–EA. stoloniferaF–GA. subpatensH–IA. subrepens. Scale bars: 0.1 mm. 
Figure 32. Lemma surface of Agrostis observed with SEM AA. scabraBA. stoloniferaCA. subpatensDA. subrepensEA. tolucensisFA. turrialbaeGA. variabilis. Scale bars:15 μm.
Figure 32. Lemma surface of Agrostis observed with SEM AA. scabraBA. stoloniferaCA. subpatensDA. subrepensEA. tolucensisFA. turrialbaeGA. variabilis. Scale bars:15 μm. 
Figure 33. Agrostis stoloniferaA whole plant B ligular area C spikelet D floret, abaxial view, E floret, lateral view showing the lemma and the palea F palea. Based on Sandoval and Hernández 380 (CIB). Scale bars: 3 cm (A); 1 mm (B); 0.5 mm (C); 0.3 mm (D, E); 0.2 mm (F).
Figure 33. Agrostis stoloniferaA whole plant B ligular area C spikelet D floret, abaxial view, E floret, lateral view showing the lemma and the palea F palea. Based on Sandoval and Hernández 380 (CIB). Scale bars: 3 cm (A); 1 mm (B); 0.5 mm (C); 0.3 mm (D, E); 0.2 mm (F). 

Other References

  1. ↑ 1.0 1.1 Widén K (1971) The genus Agrostis L. in eastern Fennoscandia. Taxonomy and distribution.Flora Fennica5: 1–209. http://hdl.handle.net/10138/36219
  2. ↑ 2.0 2.1 Harvey M (2007) Agrostis. In: Barkworth M Capels K Long S Anderton L Piep M (Eds) Flora of North America North of Mexico (Vol.24) Oxford University Press, New York, 633–662. http://floranorthamerica.org/Agrostis
  3. ↑ Dávila P, Mejía-Saulés M, Soriano-Martínez A, Herrera-Arrieta Y (2018) Conocimiento taxonómico de la familia Poaceae en México.Botanical Sciences96(3): 462–514. https://doi.org/10.17129/botsci.1894
  4. ↑ Sánchez-Ken J (2019) Riqueza de especies, clasificación y listado de las gramíneas (Poaceae) de México. Acta Botánica Mexicana 126: e1379. https://doi.org/10.21829/abm126.2019.1379
  5. ↑ GBIF (2023d) Agrostis stolonifera L. https://doi.org/10.15468/dl.qez3gb [Accesed 29.7.2023]
  6. ↑ Pohl R, Davidse G (1994) Agrostis. In: Davidse G Sousa Sánchez M Chatter A (Eds) Flora Mesoamericana (Vol.6) Instituto de Biología, Universidad Nacional Autonoma de Mexico, Mexico City, 237–240. http://legacy.tropicos.org/NamePage.aspx?nameId=40034657&projectId=3
  7. ↑ Rúgolo Z, Molina A (1997) Las especies del género Agrostis L. (Gramineae: Agrostideae) de Chile. Gayana.Botánica54: 91–156. http://www.biodiversitylibrary.org/item/91363
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