Mexico 2013 Flora de San Luis Potosi y Queretaro

Voucher:AN 477

Asteraceae
Erigeron cf. longipes DC.

Location:San Luis Potosi, Xilitla, La Trinidad, on the way to 'El Pilon'
Coordinates: 21°23'58" N, 99°04'31" W Alt: 2057m

Erect herb 45 cm tall, with woody base. Ligulate flowers white. Tubular flowers yellow.
Forest slope with Quercus and Juniperus, Vitis and Ribes. 45º E-facing slope.

Identification Notes: Verified with McVaugh, R. Compositae. Flora Novo-Galiciana 12: 1-1157. 1984. tribe Astereae. Leaves semi-amplexicaule at base and with toothed margin. Capitula solitary, bracteate at base. Phyllaries in several whorls, acute and of similar lenght with narrow menbranous margin. Ray floret numerous (200), white and to 10mm long. Cypsela flat, slightly winged and hairy later becoming fusiform. Pappus of barbate setae 10-20.

Nova, J.A. de #477      14 June 2013

morphological details

phyllaries phyllaries phyllaries phyllaries ligules ligules

capitulum capitulum

ray florets ray florets

florets florets

disc and ray florets disc and ray florets disc floret disc floret corolla apex corolla apex
ovary ovary androecium, style androecium, style androecium section androecium section
receptacle receptacle cypsela cypsela cypsela cypsela
pappus pappus stem base stem base leaf base leaf base
adaxial leaf surface adaxial leaf surface abaxial leaf surface abaxial leaf surface abaxial leaf surface abaxial leaf surface
field picture
capitulum
Herbarium voucher
Herbarium voucher