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Psilotum

Psilotum
Psilotum complanatum
Klasifikasi ilmiah
Kerajaan:
Plantae
Divisi:
Polypodiophyta
Kelas:
Polypodiopsida
Subkelas:
Ophioglossidae
Ordo:
Psilotales
Famili:
Psilotaceae
Genus:
Psilotum
Jenis (Species)

Psilotum adalah salah satu marga tumbuhan paku modern yang dianggap menempati posisi dasar (basal) dalam perkembangan evolusinya. Marga ini adalah satu dari dua marga dalam Psilotaceae. Nama ilmiah ini diambil dari bahasa Yunani psilos yang berarti "telanjang" / "polos", karena tidak memperlihatkan organ-organ yang biasa ada pada tumbuhan, seperti akar dan daun.[1]

Jenis dan penyebaran

Saat ini diakui terdapat dua jenis, Psilotum nudum dan Psilotum complanatum, dengan bastar dari keduanya juga diketahui, dinamakan Psilotum × intermedium W. H. Wagner. Keduanya mirip, namun P. nudum tumbuh relatif tegak sedangkan P.complanatum tumbuh menjuntai dengan tangkai pipih.

Penyebaran Psilotum bersifat tropis dan subtropis, di Dunia Baru, Asia, dan Pacific, dengan sedikit populasi di Eropa Baratdaya.[2] P. nudum juga ditemukan di kepulauan selatan Jepang, serta Florida, Texas, dan Hawaii.

Rujukan

  1. ^ "Etymology of Psilotum". Diarsipkan dari versi asli tanggal 2010-10-15. Diakses tanggal 2015-08-01. 
  2. ^ "Psilotum nudum" (PDF). Atlas y Libro Rojo de la Flora Vascular Amenazada de España. 
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