NATIVE WOODY PLANTS OF THE UNITED STATES 
37 
thin bark ; insect damage very rare ; wood little used commercially, potentially 
of greater value; does well in cultivation in the Eastern States; good seed 
years infrequent and at long intervals; vitality of seed transient; 16,000 seeds 
per pound, germination 40-50 percent. 
Abies venusta (Dougl.) Koch. Bristlecone fir. 
Pinus venusta Dougl. 
Range: 5. 
Site: Well-drained, sun, shade. 
Fruit : Cone ; ripe in August, breaks up in September. 
A large evergreen tree not used commercially; seed produced abundantly 
at intervals of 3 to 5 or more years, of low and transient vitality. 
Abutilon newberryi, see Horsfordia neivherryi 
Acacia spp. 
Some 450 species are known, most of them tropical; majority rapid growing 
and short-lived ; propagation is by seeds or cuttings from half -ripe wood taken 
with a heel; the seeds are treated with hot water and sown in March or 
April. 
Stomach records (in addition to specific records) : Mearn's quail. Observa- 
tions (in addition to specific records) : Texas antelope squirrel, cedar-belt 
cottontail. 
Acacia amentacea DC. Blackbriisli. 
Acaciopsis amentacea (DC.) Britt. and Rose. 
Range: 11, 16, 17, 20. 
Site: Dry, sun. 
Fruit : Legume. 
A large shrub to small tree, bearing spines; often found on sandy or other 
soils. 
Acacia angustissima (Mill.) Kuntze. Prairie acacia. 
Mimosa angustissima Mill., M. filiculoides (Cav.) Trel., A. filicina Willd., 
A. filiculoides Trel., A. Mrta (Nutt.) Robins., Acaciella hirta (Nutt.) 
Britt. and Rose., Acaciella flUculoides (Cav.) Britt. and Rose. 
Range : 11, 16, 17, 20, 22, 25, 30. 
Site: Dry, well-drained, sun. 
Fruit : Legume, available July-August. 
A small to usually large shrub or rarely a small tree ; unarmed ; blooms 
May--July and often grows im sandy and other soils. 
Stomach records: Masked bobwhite. Somewhat browsed, pods relished by 
cattle and horses. 
Acacia berlandieri Benth. Guajillo. 
Senegalia 'berlandieri (Benth.) Britt. and Rose. 
Range : 11, 16, 17. 
Site: Dry, sun. 
Fruit : Legume, available June-July. 
A small to large spiny shrub, occasionally unarmed ; flowers November- 
March ; root system very deep ; wood used for fuel locally ; an important source 
of honey. 
Acacia constricta Benth. Meseat acacia. 
Acaciopsis constricta (Benth.) Britt. and Rose. 
Range: 10, 11, 14, 16, 17. 
Site: Dry, sun. 
Fruit : Legume, available July-September. 
A small to large, spiny shrub, often with sticky foilage, adapted to a wide 
range of soil conditions but often found in sand ; seed germination about 45 
percent ; about 400 usable plants per pound of seed. 
Var. paucispina Woot. and Standi., is a larger and less spiny form usually 
found at higher elevations than the species. 
Stomach records: Masked bobwhite, Gambel quail. Observations : Jack rabbit. 
Inferior to worthless forage for livestock, except that pods are taken. A source 
of honey. 
Acacia cuspidata Schlecht. 
Range : 11. 
Site: Dry, sun. 
Fruit : Legume, available in June. 
