Current Collection Statistics

The living collection is the term we use when referring collectively to all accessioned plants growing at the Arboretum.  Arboretum staff are continually assessing and evaluating the health of the plants, their relevance to our mission, potential for invasiveness, and their aesthetic value.  As a result of this ongoing assessment we regularly remove plants from the living collection for a variety of reasons, but our plant exploration, seed collection, and plant acquisition activities provide a constant flow of new plants into the living collection that provide opportunities for evaluation, research, study and appreciation of the beauty and diversity of the plant world.

Below is an overview of the living collections, current as of January 1, 2019.   

Accessions by Type

 Seed

 
 

Number of accessions, seed-culture

127

Nursery

 
 

Number of accessions, containers

375

 

Number of items, containers

1848

Collections

 
 

Number of accessions, display

1710

 

Number of items, display

2847

 

Number of taxa, display

1368

Total

 

 

Active accessions at PHA

2201

     

Taxonomic Representation (Plant Diversity)

 

Number of families

114

 

Number of genera

347

 

Number of species

1022

 

Total unique taxa (species + cultivars)

1617

     

Accession Provenance (%)

(W)

Collected from known, wild origin

39.2

(Z)

Collected from unknown, wild origin

3.5

(G)

Garden origin

54.7

(U)

Unknown origin

2.6