A SYSTEMATIC MONOGRAPH OF THE NEOTROPICAL JUNCACEAE.
Item
-
Title
-
A SYSTEMATIC MONOGRAPH OF THE NEOTROPICAL JUNCACEAE.
-
Identifier
-
AAI8222925
-
identifier
-
8222925
-
Creator
-
BALSLEV, HENRIK.
-
Contributor
-
Tetsuo M. Koyama
-
Date
-
1982
-
Language
-
English
-
Publisher
-
City University of New York.
-
Subject
-
Biology, Botany
-
Abstract
-
'A systematic monograph of the Neotropical Juncaceae' is a taxonomic treatment of the species of Juncaceae occurring in the neotropical region, which is the region of the Americas delimited by the tropics of Capricorn and Cancer. Juncaceae is a family of some 300 species of glumiflorous Monocotyledons, similar in general habit to grasses (Poaceae) and sedges (Cyperaceae), from which it is most easily distinguished by its floral morphology. The flowers are complete, trimerous and pentacyclic, i.e. with two whorls each of three (+OR-) equal tepals, two whorls each of three stamens, and one whorl of three carpels. The fruit is a dry capsule with 3-many seeds. The plants form densely compacted cushions, dense tussocks, or they are solitary, from a few centimeters to 2 meters high. Inflorescence characters are important for distinction of genera. Oxychloe, Distichia, Patosia and Rostkovia have 1-flowered inflorescences, but differ in number and structure of bracteoles and bracts. Juncus and Luzula have many-flowered inflorescences, but differ in ovule-number, leaf sheath and blade margin structure. Three subgenera of Luzula are based on inflorescence structure, and eleven subgenera of Juncus are based on leaf blade anatomy and inflorescence structure. In the Neotropics six of the eight genera, and 49 of the ca. 300 species of the family occur. Rostkovia is subantarctic with two species, one of which occurs in Ecuador. Distichia is Andean with two species, both in the Neotropics. Patosia is monotypic in the southern Andes, and barely reaches the Neotropics in Bolivia. Oxychloe has six species in the southern Andes, one of which reaches southern Peru. Luzula is mainly temperate with ca. 75 species, eight of which reach the Neotropics. Juncus is likewise temperate, and includes ca. 225 species of which 36 reach the Neotropics. Ecologically neotropical Juncaceae are restricted to the highlands, and usually occur above 1000 meters altitude.
-
Type
-
dissertation
-
Source
-
PQT Legacy CUNY.xlsx
-
degree
-
Ph.D.
-
Program
-
Biology
