Cyathea

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Cyathea
Black cup fern (Cyathea medullaris)

Black cup fern ( Cyathea medullaris )

Systematics
Department : Vascular plants (tracheophyta)
Ferns
Class : True ferns (Polypodiopsida)
Order : Tree ferns (Cyatheales)
Family : Cyatheaceae
Genre : Cyathea
Scientific name
Cyathea
Sm.

Cyathea is a genus in the family of Cyatheaceae within the order of the tree fern (Cyatheales). They are also called cup ferns.

features

Illustration from Florae Columbiae , plate CLXXIX by Cyathea quitensis
Illustration of Cyathea colensoi
Leaflets from below with the Sori in Cyathea robusta

The Cyathea species are predominantly tree-shaped ferns. They usually form upright stems with a polycyclic dictyostele . The tip of the shoot and usually the bases of the leaf stalks are covered with scales or hair.

The leaves of the Cyathea species are divided into petioles and leaf blades and are usually relatively large with lengths of up to 5 meters. The petiole has two conspicuous pneumathodes. The leaf blade is rarely simple, usually two to three pinnate. The round sori are located on the underside of the leaflets . The leaf nerves are simple or forked and usually end anastomosing .

The Cyathea species differ from other species of the order of the tree ferns (Cyatheales) by their marginate scales: The cells at the edge of the scales are smaller than in the middle and not oriented lengthways like these. The spores usually have two perine layers and a holey exine . Only in the subgenus Hymenophyllopsis is a perine layer present and there are no holes in the exine.

The Sori are on the underside of the leaf along the leaf veins or close to the leaf edge, i.e. submarginal in the subgenus Hymenophyllopsis . The Sori are round, without indusia or with saucer-shaped, cup-shaped or spherical indusia. In the case of Hymenophyllopsis , the indusia are bilobed. The sporangia mature one after the other, the annulus is dark. Usually paraphyses occur. The spores are tetrahedral, trilet (three-pointed stigma) and decorated in different ways.

The gametophyte is green and heart-shaped.

Systematics and distribution

Illustration from Gustav Kunze (1793–1851) Die Fernkräuter ... , 1840 Plate LXXVI from Cyathea equestris
Illustration from Gustav Kunze (1793–1851) Die Fernkräuter ... , 1840 Plate LXXXVI by Cyathea dombeyi

Taxonomy

The genus Cyathea was established in 1793 by James Edward Smith in Mémoires de l'Academie Royale des Sciences (Turin) , Volume 5, page 416. As Lektotypusart in 1875 Cyathea arborea (L.) Sm. By John Smith in Historia Filicum; an exposition of the nature, number, and organography of ferns ... , page 244. The generic name Cyathea is derived from the Greek word kyathos for "cup" and refers to the shape of the indusium in some species.

Botanical history

The genus Cyathea has varied in size in the past. Through molecular genetic analyzes, some formerly independent genera were included in Cyathea . Synonyms for Cyathea . Sm are: × Cyathidaria Caluff & Shelton , Actinophlebia C.Presl , Alsophila R.Br. , Amphicosmia Gardner , Chnoophora Kaulf. , Cnemidaria C. Presl , Cnemidopteris Rchb. , Cormophyllum Newman , Disphenia C.Presl , Gymnosphaera Blume , Hemistegia C.Presl , Hemitelia R.Br. , Hymenophyllopsis K.I. Goebel , Microstegnus C.Presl , Sphaeropteris Bernh. , Sphaeropteris subg. Sclephropteris P.G.Windisch , Trichipteris C.Presl , Trichopteris Spreng. The extent of the genus Cyathea is still controversially discussed, with some authors (as in the Flora of China 2013) some species are also in independent genera such as Alsophila R.Br. (about 230 species), Cnemidaria C. Presl (about 25 species) and Sphaeropteris Bernh. (about 120 species).

Depending on the author, very different relationships are shown.

For example, in Korall et al. In 2007 the relationships are shown as follows: The species of the Old World are separated from those of the New World. Within the species of the New World, Hymenophyllopsis is the basal group. The eight species of the subgenus Hymenophyllopsis are small, have a rhizome a few centimeters long and thin, stomata- free leaves. However, their scales and spores are similar to those of Cyathea . The species of the subtaxon Cnemidaria are not tree-shaped, their pinnate to pinnate leaves are not hairy. Together with Cyathea speciosa , they form a monophyletic group within the New World Cyathea species. The earlier genus Trichipteris , which is characterized by the absence of Indusia , is not a monophyletic group; its species are scattered within the New World clade.

In 2016, the Pteridophyte Phylogeny Group classified the species of the Cyatheaceae family in only three genera, including many species of the Cyathea s. l. into the genera Alsophila R.Br. (about 230 species) and Sphaeropteris Bernh. (about 120 species), but the species of the genus Cnemidaria C.Presl in the Cyathea s. st.

Species and their distribution

Habit of the West Indian tree fern ( Cyathea arborea ) in the stand
Habit of Cyathea borbonica on Réunion
Young leaves before unrolling and fully developed stalked, pinnate leaves of Cyathea brunei
Habit of Cyathea capenis
Habit of Cyathea cooperi
Habit of Cyathea crinita
Habit of Cyathea cunninghamii in New Zealand
Habit of Cyathea delgadoi
Habit of Cyathea dregei
Habit of Cyathea glauca
Habit of Cyathea howeana
Habit of Cyathea lepifera
Upper end of the stem and petioles of Cyathea macarthurii
Habit of Cyathea manniana
Habitus of Cyathea medullaris in large numbers
Habit of Cyathea princeps
Habit of Cyathea pungens
Young pre-unfurling leaves and petioles of Cyathea quindiuensis
Habit of Cyathea rebeccae
Habit of Cyathea robusta
Habit of Cyathea smithii
Young leaves before unrolling and petioles of Cyathea tomentosissima

In the genus Cyathea s. l. there are 250 to 500 or up to 600 species:

use

Some species ( e.g. Cyathea australis , Cyathea brownii , Cyathea cooperi , Cyathea dealbata , Cyathea dregei , Cyathea medullaris ) are used as ornamental plants in parks and gardens . Most species do not tolerate frost (only Cyathea dealbata can withstand a little frost when protected from the wind).

supporting documents

literature

  • Petra Korall, DS Conant, JS Metzgar, H. Schneider, KM Pryer: A Molecular Phylogeny of Scaly Tree Ferns (Cyatheaceae). In: American Journal of Botany , Volume 94, 2007, pp. 873-886.
  • Pteridophyte Phylogeny Group: A community-derived classification for extant lycophytes and ferns. In: Journal of Systematics and Evolution Volume 54, Issue 6, 2016, pp. 563-603. doi : 10.1111 / jse.12229

Individual evidence

  1. a b c d e f g h i j NZflora online from Landcare Research .
  2. James Edward Smith 1793: scanned in at biodiversitylibrary.org .
  3. ^ Cyathea at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed February 23, 2019.
  4. a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg bh bi bj bk bl bm bn bo bp bq br bs bt bu bv bw bx by bz ca cb cc cd ce cf cg ch ci cj ck cl cm cn co cp cq cr cs ct cu cv cw cx cy cz da db dc dd de df dg dh di dj dk dl dm dn do dp dq dr ds dt du dv dw dx dy dz ea eb ec ed ee ef eg eh ei ej ek el em en eo ep eq er es et eu ev ew ex ey ez fa fb fc fd fe ff fg fh fi fj fk fl fm fn fo fp fq fr fs ft fu fv fw fx fy fz ga gb gc gd ge gf gg gh gi gj gk gl gm gn go gp gq gr gs gt gu gv gw gx gy gz ha hb hc hd he hf hg hh hi hj hk hl hm hn ho hp hq hr hs ht hu hv hw hx hy hz ia ib ic id ie if ig ih ii ij ik il im in io ip iq ir is it iu iv iw ix iy iz ja jb jc jd je jf jg jh ji jj jk jl jm jn jo jp Vascular Plants of the Americas : Cyathea at Tropicos.org. In: 83 . Missouri Botanical Garden, St. Louis
  5. ^ Petra Korall, David S. Conant, Jordan S. Metzgar, Harald Schneider, Kathleen M. Pryer: A Molecular Phylogeny of Scaly Tree Ferns (Cyatheaceae). In: American Journal of Botany , Volume 94, 2007, pp. 873-886. doi : 10.3732 / ajb.94.5.873
  6. Pteridophyte Phylogeny Group: A community-derived classification for extant lycophytes and ferns. In: Journal of Systematics and Evolution , Volume 54, Issue 6 2016, pp. 563-603. doi : 10.1111 / jse.12229
  7. a b c d e f g h Peter G. Wilson: Data sheet at New South Wales Flora online .
  8. ^ A b Walter Erhardt , Erich Götz, Nils Bödeker, Siegmund Seybold: The great pikeperch. Encyclopedia of Plant Names. Volume 2: Types and Varieties. Eugen Ulmer, Stuttgart (Hohenheim) 2008, ISBN 978-3-8001-5406-7 .
  9. a b c d e f g h i j Gordon Cheers (Ed.): Botanica. The ABC of plants. 10,000 species in text and images . Könemann Verlagsgesellschaft, 2003, ISBN 3-8331-1600-5 (therein pages 276-277).

Web links

Commons : Cyathea  - collection of images, videos and audio files

further reading

  • Fulgent P. Coritico, Victor B. Amoroso, Marcus Lehnert: New records, names and combinations of scaly tree ferns (Cyatheaceae) in eastern Malesia. In: Blumea , Volume 62, Issue 2, 2017, pp. 92–96. doi : 10.3767 / blumea.2017.62.02.03
  • Marcus Lehnert, Adrian Tejedor: Three new scaly tree fern species (Cyathea-Cyatheaceae) from the Amotape-Huancabamba Zone and their biogeographic context. In: American Fern Journal , Volume 106, Issue 3, October 2016. doi : 10.1640 / AFJ-D-16-00002.1
  • Marcus Lehnert: A synopsis of the exindusiate species of Cyathea (Cyatheaceae-Polypodiopsida) with bipinnate-pinnatifid or more complex fronds, with a revision of the C. lasiosora complex. In: Phytotaxa , Volume 243, Issue 1, 2016, pp. 1–53. doi : 10.11646 / phytotaxa.243.1.1
  • Marcus Lehnert, A. Weigand: A synopsis of the Neotropical species of the genus Cyathea (Cyatheaceae-Polypodiopsida) with bipinnate fronds. In: Brittonia , 2016 doi : 10.1007 / s12228-016-9445-1
  • A. Weigand, Marcus Lehnert: The scaly tree ferns (Cyatheaceae) of Brazil. In: Acta Botanica Brasilica , Volume 30, Issue 3, 2016, 15 pages. doi : 10.1590 / 0102-33062016abb0065
  • Santiago Ramírez-Barahona, Josué Barrera-Redondo, Luis E. Eguiarte: Rates of ecological divergence and body size evolution are correlated with species diversification in scaly tree ferns. In: Proceedings of the Royal Society B: Biological Sciences , Volume 283, 2016. doi : 10.1098 / rspb.2016.1098
  • Marcus Lehnert: Correction to Phytotaxa 61: A synopsis of the species of Cyathea (Cyatheaceae-Polypodiopsida) with pinnate to pinnate-pinnatifid fronds. In: Phytotaxa , Volume 130, 2013, p. 60.
  • Petra Korall, Kathleen M. Pryer: Global biogeography of scaly tree ferns (Cyatheaceae): evidence for Gondwanan vicariance and limited transoceanic dispersal. In: Journal of Biogeography , Volume 41, Issue 2, 2014, pp. 402-413. doi : 10.1111 / jbi.12222
  • Maarten JM Christenhusz, Xian-Chun Zhang, Harald Schneider: A linear sequence of extant families and genera of lycophytes and ferns. In: Phytotaxa , Volume 19, 2011, p. 12. online doi : 10.11646 / phytotaxa.19.1.2
  • Maarten JM Christenhusz: New combinations and an overview of Cyathea subg. Hymenophyllopsis (Cyatheaceae). In: Phytotaxa , Volume 1, 2009, pp. 37-42.
  • Marcus Lehnert: A synopsis of the species of Cyathea (Cyatheaceae-Polypodiopsida) with pinnate to pinnate-pinnatifid frond. In: Phytotaxa , Volume 61, 2012. doi : 10.11646 / phytotaxa.61.1.2
  • Marcus Lehnert: Three new species of scaly tree ferns ( Cyathea -Cyatheaceae) from the northern Andes. In: Phytotaxa , Volume 2, 2009, pp. 43-56.
  • Marcus Lehnert: New species and records of tree ferns (Cyatheaceae, Pteridophyta) in the northern Andes. In: Organisms, Diversity & Evolution , Volume 6, pp. 321-322, electronic supplement 13, 2006, pp. 1-11.
  • Gustav Kunze (1793–1851): The fern herbs in colored illustrations, faithfully explained and described , 1840. scanned.