Skip to main content

Two New Species of Heterocoma (Asteraceae: Vernonieae) and a Broadened Concept of the Genus

Buy Article:

$23.00 plus tax (Refund Policy)

Abstract:

Abstract—

A new concept of the genus Heterocoma is presented based on morphological and anatomical evidence. The genus is characterized by the combination of foliose subinvolucral bracts, fimbrillate or paleaceous receptacles, glabrous cypselae, and a caducous biseriate pappus (at least the inner series). A putative synapomorphy of the genus is the presence of phytomelanin in the cypselae walls. The monotypic genera Bishopalea, Sipolisia, and Xerxes are synonymized under Heterocoma with the following new combinations: Heterocoma ekmaniana , Heterocoma erecta , and Heterocoma lanuginosa . Two new species, Heterocoma gracilis and Heterocoma robinsoniana , are described and illustrated. The genus is endemic to the campos rupestres of the Brazilian Central Plateau. A key to the six species recognized in Heterocoma is provided.

Keywords: Brazil; Compositae; Sipolisiinae; phytomelanin; taxonomy

Document Type: Research Article

DOI: http://dx.doi.org/10.1600/036364413X661863

Publication date: March 1, 2013

More about this publication?

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more