Plazia

From Species-ID
Jump to: navigation, search
Notice: This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.

If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly.

This page should be cited as follows (rationale):
Dillon M, Luebert F (2014) Synopsis of Plazia Ruiz & Pav. (Onoserideae, Asteraceae), including a new species from northern Peru. PhytoKeys 34 : 1–13, doi. Versioned wiki page: 2014-01-31, version 41320, https://species-id.net/w/index.php?title=Plazia&oldid=41320 , contributors (alphabetical order): Pensoft Publishers.

Citation formats to copy and paste

BibTeX:

@article{Dillon2014PhytoKeys34,
author = {Dillon, Michael O. AND Luebert, Federico},
journal = {PhytoKeys},
publisher = {Pensoft Publishers},
title = {Synopsis of Plazia Ruiz & Pav. (Onoserideae, Asteraceae), including a new species from northern Peru},
year = {2014},
volume = {34},
issue = {},
pages = {1--13},
doi = {10.3897/phytokeys.34.6151},
url = {http://www.pensoft.net/journals/phytokeys/article/6151/abstract},
note = {Versioned wiki page: 2014-01-31, version 41320, https://species-id.net/w/index.php?title=Plazia&oldid=41320 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - Synopsis of Plazia Ruiz & Pav. (Onoserideae, Asteraceae), including a new species from northern Peru
A1 - Dillon M
A1 - Luebert F
Y1 - 2014
JF - PhytoKeys
JA -
VL - 34
IS -
UR - http://dx.doi.org/10.3897/phytokeys.34.6151
SP - 1
EP - 13
PB - Pensoft Publishers
M1 - Versioned wiki page: 2014-01-31, version 41320, https://species-id.net/w/index.php?title=Plazia&oldid=41320 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/phytokeys.34.6151

Wikipedia/ Citizendium:

<ref name="Dillon2014PhytoKeys34">{{Citation
| author = Dillon M, Luebert F
| title = Synopsis of Plazia Ruiz & Pav. (Onoserideae, Asteraceae), including a new species from northern Peru
| journal = PhytoKeys
| year = 2014
| volume = 34
| issue =
| pages = 1--13
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/phytokeys.34.6151
| url = http://www.pensoft.net/journals/phytokeys/article/6151/abstract
| pmc =
| accessdate = 2024-12-22

}} Versioned wiki page: 2014-01-31, version 41320, https://species-id.net/w/index.php?title=Plazia&oldid=41320 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Asterales
Familia: Asteraceae

Name

Plazia Ruiz & Pav., Fl. Peruv. Prodr.: 92. 1794. – Wikispecies link – Pensoft Profile

Type

Plazia conferta Ruiz & Pav.

Description

Shrubs 1–2 m tall, the branches erect to ascending; stems lacking spines. Leaves simple, sessile, in whorls at branch tips; blades lanceolate to oblanceolate, glabrous to glandular, usually appressed, the margins entire. Capitulescences of solitary, terminal heads, sessile. Capitula heterogamous, radiate or more rarely homogamous, discoid; involucres cylindrical to campanulate; receptacles plane, glabrous; phyllaries 5–7-seriate, lanceolate; ray florets 5–25, the corollas ligulate-bilabiate, the outer lip 4-nerved, tridentate, the inner lip bifid; styles cylindric, glabrous, bifid, the branches short, inconspicuous; disc florets 7–40, the corollas tubular, actinomorphic, glabrous, the limb deeply 5-lobed, the lobes greater than 1/3 the length of the corolla, coiled; anthers linear, the terminal appendages lanceolate, fused into a column, truncate, the bases caudate; styles claviform, the branches short, rounded. Achenes glabrous or glandular-pubescent; pappus of scabrid bristles, isomorphic, yellowish. Chromosome number: unknown.

Distribution

All species are confined to the Andean Cordillera and associated inter-Andean valleys (Fig. 1). Two species are confinded to Peru; both are rare and only known from a few collection localities. Another species is restricted to the Andes of central Chile. Plazia daphanoides Wedd. is the only wideranging species, being recorded from southern Peru and adjacent Argentina, Bolivia and Chile, usually in high-elevation, dry sites (Cabrera 1978[1], Ferreyra 1980[2], 1995[3]).

Discussion

The genus Plazia was described by Ruiz López and Pavón (1794)[4] and they subsequently published its first species, Plazia conferta Ruiz & Pav. (1798). All efforts at locating material corresponding to their type collection from Peru have not been successful (Cabrera 1960[5]).
Weddell (1855)[6] provided an emended generic description for Plazia and he recognized three species: Plazia conferta Ruiz & Pav., Plazia cheiranthifolia (J. Remy) Wedd., and Plazia daphnoides Wedd. Reiche (1905)[7] picked up the implied transfers by Hoffmann (1890–1894)[8] and treated Plazia in Chile as having three species: Plazia cheiranthifolia, Plazia pinifolia (Phil.) O.Hoffm. [= Gypothamnium pinifolium Phil.], and Plazia virgata (Phil.) O.Hoffmann [=Aphyllocladus denticulatus (J.Rémy ex Gay) Cabrera]. Recent floristic treatments have accepted Plazia as distinct from Aphyllocladus and Gypothamnium (e.g., Cabrera 1978[1], Ferreyra 1995[3], Hind 2009[9], Marticorena and Quezada 1985[10], Zuloaga and Morrone 1999[11]). The addition of the northern Peruvian species described here brings the total number of recognized species to four.

Key to species of Plazia

Key to species of Plazia — M. Dillon , F. Luebert
1
Leaves oblong or oblong-spathulate, 8–18 mm long, 2–3.5 mm wide; capitula with 5–8(–10) ray florets, (7–)10–11(–12) disc florets; involucres cylindrical (Argentina, Bolivia, Chile, Peru) 
  Plazia daphnoides Wedd.
–
Lead statement missing! 
  Leaves elliptic to oblanceolate or oblong, 22–42 mm long, 3–6 mm wide; capitula lacking obvious ray florets or more commonly with 15–25 ray florets, (9–)20–25(–40) disc florets; involucres campanulate 2
2
Leaves oblong, 28–30 mm long, 7.5–8 mm; corollas more or less isomorphic, obvious ligules lacking (Central Chile) 
  Plazia cheiranthifolia (J.Rémy) Wedd.
–
Leaves oblanceolate, 10–25 mm long, 1–3 mm wide; corollas dimorphic, outer florets with ligules obvious (Peru) 
  3
3
Involucre 25–30 mm in diameter; ray florets 15–20, disc florets c. 40 
  Plazia robinsonii M.O.Dillon & Sagást.
–
Involucre 12–16 mm in diameter; ray florets18–20, disc florets 10–20 
  Plazia conferta Ruiz & Pav.

Taxon Treatment

  • Dillon, M; Luebert, F; 2014: Synopsis of Plazia Ruiz & Pav. (Onoserideae, Asteraceae), including a new species from northern Peru PhytoKeys, 34: 1-13. doi

Images

Figure 1. Distribution map of the currently recognized species of Plazia. The shaded area indicates high-elevation areas of the Andes above 3000 m. Locality data were obtained from Cabrera (1951)[12], Ferreyra (1995)[3], Missouri Botanical Garden (http://www.tropicos.org/), Instituto de Botánica Darwinion (through http://www.gbif.org/) and the herbaria ASU, B, F, HUT, P, SGO, US.
Figure 1. Distribution map of the currently recognized species of Plazia. The shaded area indicates high-elevation areas of the Andes above 3000 m. Locality data were obtained from Cabrera (1951)[12], Ferreyra (1995)[3], Missouri Botanical Garden (http://www.tropicos.org/), Instituto de Botánica Darwinion (through http://www.gbif.org/) and the herbaria ASU, B, F, HUT, P, SGO, US. 

Other References

  1. ↑ 1.0 1.1 Cabrera A (1978) Flora de la Provincia de Jujuy. Compositae. Colección Científica del INTA, Buenos Aires, 1–726.
  2. ↑ Ferreyra R (1980) El género Plazia en el Perú. Boletín de la Sociedad Peruana de Botánica 8: 101-105.
  3. ↑ 3.0 3.1 3.2 Ferreyra R (1995) Family Asteraceae: Part VI, Tribe Mutiseae. In: Macbride J. Flora of Peru. Fieldiana Botany. N.S. 35: 1-101.
  4. ↑ Ruiz López H, Pavón J (1794) Florae Peruvianae, et Chilensis Prodromus. Madrid, 1–154.
  5. ↑ Cabrera A (1960) Notas sobre tipos de Compuestas Sudamericanas en herbarios Europeos. III, Los tipos de Ruiz y Pavón. Boletín de la Sociedad Argentina de Botánica 8(3–4)): 195-215.
  6. ↑ Weddell H (1855) Chloris Andina, vol 1. P.Bertrand, Paris, 1–231. doi: 10.5962/bhl.title.217
  7. ↑ Reiche C (1905) Estudios criticos sobre la Flora de Chile. Anales de la Universidad de Chile 114: 735-738.
  8. ↑ Hoffmann O (1890–1894) Compositae. In: Engler H Prantl K (Eds). Die natürlichen Pflanzenfamilien. Wilhelm Engelmann Verlag, Leipzig, 4(5): 87-387.
  9. ↑ Hind D (2009) An annotated preliminary checklist of the Compositae of Bolivia. http://www.kew.org/science/tropamerica/boliviacompositae/checklist.pdf [accessed 7 Jan 2014]
  10. ↑ Marticorena C, Quezada M (1985) Catálogo de la flora vascular de Chile. Gayana, Botánica 42(1–2)): 1-155.
  11. ↑ Zuloaga F, Morrone O (1999) Catálogo de las Plantas Vasculares de la Argentina. Dicotyledoneae. Monographs in Systematic Botany Missouri Botanical Garden 74: 1-1246.
  12. ↑ Cabrera A (1951) Notas sobre compuestas de la América Austral. I. Los géneros afines a Plazia. Darwiniana 9(3–4)): 363-373.
Retrieved from "https://species-id.net/w/index.php?title=Plazia&oldid=41320"