dimanche 18 novembre 2007

Laelia alvaroana


Cette espèce de Laelia a été ainsi nommée car c'est Alvaro Pessoa, un membre de la "Sociedade de Orquidófilos do Rio de Janeiro" qui a fourni les specimens ayant permis la description de cette nouvelle espèce par Fransisco Miranda en 1999.

Laelia alvaroana est la seconde espèce du genre Parviflorae décrite dans l'Etat de Rio de Janeiro. Cette espèce pousse sur des pans rocheux inclinés dans une petite région, entre Nova Friburgo et Santa Maria Madalena, de la Serra dos Orgãos, à une altitude comprise entre 500 et 1200 mètres d'altitude.

Cette espèce ressemble fortement à Laelia mixta mais elle présente des rugosités transversales sur les feuilles, ces dernières étant par ailleurs lancéolées et légèrement réflèchies. Les fleurs de Laelia alvaroana sont également plus petites et fines (pétales) et plus espacées sur la hampe. La base du lobe médian est finement ondulée quand Laelia mixta montre des ondulations fortes. La couleur est jaune-orangée alos que Laelia mixta est davantage jaune pur. Les sépales mesurent 2,4 cm x 6 mm et les pétales 2,4 cm x 5 mm. Le label mesure 16 mm de long.
L'époque de floraison est comprise entre décembre et mars dans l'hémisphère Sud.

5 commentaires:

chorelline a dit…

Superbe celui-ci...et surtout ravie qu'il y ait du nouveau sur le blog!

On m'appelle nico... a dit…

oui, après une interruption involontaire, le blog reprend sa route...

Anonyme a dit…

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Anonyme a dit…

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