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 newberryi 



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. Blackbrush. 



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. flliculoides Trel., A. Mrta (Nutt.) Robins., Avaciella hirta (Nutt.) 

 Britt. and Rose., Acaciella filiculoides (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 i 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. Mescat 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 Standl., is a larger and less spiny form usually 

 found at higher elevations than the species. 



Stomach records: Masked bob'vhite, 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. 



