Quest for Prunus murrayana in West Texas

While Preparing botanical trip to Texas Trans Pecos , I focus on this unobserved species.

This is almost the only picture of Prunus murrayana ; this nice site is roughly a web version of A FIELD GUIDE TO TEXAS TREES, Simpson, Benny J. ; ISBN 10: 0877191131 / ISBN 13: 9780877191131 ; Published by Texas Monthly Pr, 1988

From the Prunus murrayana entry in FNA it appears that it is hairy everywhere; also note that are 2 path in Prunus key leading to P.m.

It is grown in no botanical garden: plantsearch.bgci.org

There are no observation in gbif.org , just about 50 herbarium entries, some of which with pictures . BUT 11 have coordinates and location indications :)
https://www.gbif.org/occurrence/search?taxon_key=3022173
10 observation in gbif.org with coordinates from year 1997 are related to this paper by M. F. Enquist : https://www.biodiversitylibrary.org/partpdf/175811
where he identified the hairy specimens in Edwards Plateau as P. murrayana .
I extracted the relevant columns from the gbif Prunus murrayana data, resulting in a CSV file that is importable in http://umap.openstreetmap.fr/ ( or certainly other map tools ) :
http://jmvanel.free.fr/Botany/Prunus_murrayana.csv
So one can see that these observations of 1997, and one of 1947, are around Sonora, plus one near Alpine.
But it can be expected in Trans Pecos, in “rocky stream banks, canyons, dry washes, fence rows”, particularly in Davis Mountains, Glass Mountains. Del Norte Mountains (cf links above).

So there is room for observations in inat’ ! I’ll try during my stay on April 4-19 .

5 Likes

This photo is captioned “Prunus murrayana”.
https://www.flickr.com/photos/texasflora/49728119871/in/photolist-2nwRSYF-2iLiBx6-8gWgS3-2p6x8ob/

Indeed , this is the only other live picture , except the herbarium ones.
Alas it says:
Private land, Brewster CO, TX.
The photo does not contradict the FNA description.
What is interesting is that it flowers in the Trans Pecos. As written in paper by M. F. Enquist :
The known populations of P. murrayana, all west of the Pecos River, have never been known to set fruit.

Note that in this paper there are tens of other locations of specimens examined, like Jailhouse Canyon on Iron Mountain Ranch in Glass Mountains, both sides of creekbed in limestone, 22 Mar 1994, P. Manning 728 (SRSC); . I will study this.
For now I put on this map the 11 coordinates from gbif.org:
http://umap.openstreetmap.fr/fr/map/prunus-murrayana_1021186#8/30.867/-102.228
I began to put on this other map points from the textual descriptions:
https://caltopo.com/m/K2L8P

I’ll be in Alpine around April 8 , join me to track Prunus murrayana !

1 Like