Mexico 2013 Flora de San Luis Potosi y Queretaro

Voucher:AN 479

Asteraceae
Bidens triplinervia Kunth

Location:San Luis Potosi, Xilitla, La Trinidad, on the way to 'El Pilon'
Coordinates: 21°24'06" N, 99°04'21" W Alt: 2004m

Herb, ascending to 50 cm tall. Flowers yellow. Anther tubes dark brown. Phyllaries green.
Forest. Growing under Pinus with ferns and Rubus.

Identification Notes: Verified with Jerzy Rzedowski 2008 'Flora del bajío y de regiones adyacentes Compositae tribu Heliantheae' Vol 157. Tribe Heliantheae. Tall herbaceous plant. Leaves dissected with linear segments. Capitula solitary, radiate. Phylaries in 2-3 series, inner one hispidilous. Ligululate florets yellow sterile and without stigmas. Disc florets yellow, bisexual and fertile. Receptacle flat with linear scales. Cypsela long, fusiform with 2 short barbate setae at the apex.

Nova, J.A. de #479      14 June 2013

morphological details

phyllaries phyllaries phyllaries phyllaries ligule ligule

capitulum capitulum

disc florets disc florets

disc florets disc florets

ligulate floret ligulate floret floret section floret section androecium androecium
androecium section androecium section ovary ovary fruiting capitulum fruiting capitulum
cypsela cypsela cypsela cypsela cypsela cypsela
pappus pappus stem stem indumentum indumentum
adaxial leaf surface adaxial leaf surface abaxial leaf surface abaxial leaf surface  
field picture
habitat
Herbarium voucher
Herbarium voucher

Other field pictures

capitulum
capitulum
leaves