Echeveria

SECUNDA fa BYRNESII   (Rose) Kimnach, 1998

Synonyms :

Echeveria byrnesii  Rose (1905) / Echeveria secunda var. byrnesii  (Rose) von Poellnitz (1936)

 

Type : Rose & Painter 7991, Nevado de Toluca, Estado de México, October 15, 1903.

 

Etymology : Named for E. M. Byrnes.

 

Distribution : Mexico (Estado de México : Nevado de Toluca, Tultenango Canyon), around 4000 m.

 

 

First Description by Rose as Echeveria byrnesii in Britten & Rose, North American Flora 22: 20. 1905 :

 

Acaulescent, forming dense rosettes of leaves.

 

Leaves bright-green or tinged with red, not at all glaucous, obovate to oblanceolate, 4 - 5 cm long, about 2 cm broad at widest part, mucronate.

 

Inflorescence a secund raceme, leaves of flowering stem narrow.   

                 

Flowers : Sepals narrowly ovate, acute, corolla about 1 cm long, the lobes acute, winged on the back (at least the herbarium specimens).

 

Cytology : n = 30, 32.

 

 

Note :

 

1. This is an alpine variant of E. secunda, growing at an altitude of ca 4000 m, distinctive because of its shining green leaves.

 

2. The text in E. Walther, Echeveria, 1972, is of no use because it describes plants collected at Ojo del Agua and not  E. byrnesii from Nevado de Toluca.

 

 

 

 

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