Stylidium subg. Tolypangium

Taxobox
name = "Tolypangium"


image_caption = Curtis's Botanical Magazine print of "Stylidium scandens", a member of subgenus "Tolypangium", section "Verticillatae".
regnum = Plantae
divisio = Magnoliophyta
classis = Magnoliopsida
ordo = Asterales
familia = Stylidiaceae
genus = "Stylidium"
subgenus = "Tolypangium"
subgenus_authority = (Endl. 1838) Mildbr. 1908
subdivision_ranks = Sections
subdivision ="Despectae" "Debilia" "Echinospermum" "Floodia" "Guttatae" "Junceae" "Lanata" "Lineares" "Repentes" "Saxifragoidea" "Sparsifoliae" "Squamosae" "Verticillatae"

"Tolypangium" is a subgenus of the genus "Stylidium" that is characterized by ovoid to longish capsules. This subgenus was part of the earliest taxonomic division among the triggerplants (genus "Stylidium"). Stephan Ladislaus Endlicher first split the genus into two subgenera in 1838: "Tolypangium" with is ovoid capsules and "Nitrangium" with its linear capsules. Subsequent authors generally followed this classification, which is based almost entirely on the features of the capsule.Erickson, Rica. (1958). "Triggerplants". Perth, Western Australia: Paterson Brokensha Pty. Ltd.] Recent genetic analysis, combined with an exhaustive morphological comparison, has revealed that the classification defined by Johannes Mildbraed in 1908 is not the most accurate description of how the members of different subgenera and sections are related.Laurent, N., Bremer, B., and Bremer, K. (1999). Phylogeny and generic interrelationships of the Stylidiaceae (Asterales), with a possible extreme case of floral paedomorphosis. "Systematic Botany", 23(3): 289-304.] Wagstaff, S.J. and Wege, J. (2002). [http://www.amjbot.org/cgi/content/full/89/5/865 Patterns of diversification in New Zealand Stylidiaceae] . "American Journal of Botany", 89(5): 865-874.] As part of the "Flora of Australia" series, Juliet Wege will be reviewing and updating the taxonomy of the Stylidiaceae. [ [http://science.calm.wa.gov.au/people/index.php?sid=144 Juliet Wege biography] at the Department of Environment and Conservation staff database. Accessed 27 May 2007.]

References