Part Three

Picture 3 A.parryi var couesii near jerome

A closer look at:  A. parryi var. couesii

  1. parryi var.couesii is a smaller form of A. parryi and grows in the most north westerly part of the distribution of the Parryaceae  This slow growing variety was described in 1875 by  Engelmann.

One of the sites where you can find these plants is near Prescott,  but they can also be found in Jerome and Sedona, Arizona U.S.A.
 
The plants from Sedona,  growing at high altitude,  are winter hardy in Europe, but any originally from  a lower and warmer part of the canyon are not.
 J.Thiede (2001),  following Gentry (1982), maintained the rank of variety. Benson & Darrow (1981) saw this variety more as synonym of  A. parryi var. parryi, as did B. Ullrich. They found it logical that plants which occur in the northwest of the distribution have much smaller flowers and leaves . Plants the growing on the edge of their area of distribution are always different.
The plants are smaller and the leaves are narrower.

picture 1


picture 2

In the Annual Report Missouri Botanical Garden from 1911, we find 6 nice pictures, ( 1 & 2) here also you can see that the leaves are much smaller than other A. parryi forms. 

Picture 3 Agave parryi var couesii near Sedona
So far as we know now are the plants coming from Sedona, Prescott and Jerome grow very slowly and are winter hardy.(See pictures 3, 4 & 5.)
 Agave parryi  var. couesii is easily recognizable there and so we feel it is a valid species.

Picture 4 near Sedona

Picture 5 near Sedona

To by continuded sie part 4

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