Mexico 2013 Flora de Puebla y Veracruz

Voucher:LCO 2604

Asteraceae
Dahlia merckii Lehm.

Location:Puebla, Mpio San Salvador el Seco, San J. Barroso, between San Salvador El Seco and San Nicolas Buenos Aires.
Coordinates: 19°10'23" N, 97°36'30" W Alt: 2372m

Tuberous herb 60 cm tall and spread. Tubers translucent yellow inside. Ligulate flowers very pale mauve. Tubular flowers yellow.
Open volcanic rock and sand area. Growing with Mirabilis.

Identification Notes: Verified with Sorenson, P.D. 1969 'Revision of the genus Dahlia' Rhodora 71: 309-416. Tribe Heliantheae. Section Dahlia. Pinnules alternate on the leaf rachis. Petioles long and hollow. Capitulum radiate, ligules pink. Outer phyllaries recurved to spreading.

Caamaño Onofre, L. #2604      1 June 2013

morphological details

phyllaries phyllaries florets florets inner phyllaries inner phyllaries

ray floret ray floret

ovary ovary

disc floret disc floret

floret section floret section androecium, style androecium, style stigmas stigmas
receptacle receptacle cypsela cypsela cypsela cypsela
stem stem adaxial leaf surface adaxial leaf surface abaxial leaf surface abaxial leaf surface
field picture
habitat
Herbarium voucher
Herbarium voucher

Other field pictures

habitat
capitulum