138 MISC. PUBLICATION 303, U. S. DEPT. OF AGRICULTURE 



Grossularia parish!!, see Ribes divaricatum. 

 Grossularia pinetorum, see Ribes pinetorum. 

 Grossularia quercetorum, see Ribes quercetorum. 

 Grossularia roezlii, see Rites roezlii. 

 Grossularia rotundifolia, see Ribes rotundifolium. 

 Grossularia sericea, see Ribes sericeum. 

 Grossularia setosa, see Ribes setosum. 

 Grossularia speciosa, see Riles speciosum. 

 Grossularia velutina, see Ribes velutinum. 

 Grossularia victoris, see Ribes victoris. 

 Grossularia watsoniana, see Ribes watsonianum. 

 Guiacum angustifolium, see Porlieria augustifolia. 



Gutierrezia linearis Rydb. Turpentine weed. 



Range: 15, 16. 

 Site: Dry, sun. 

 Fruit: Achene. 

 A small shrub ; flowers July-September. 



Gutierrezia longifolia Greene. Turpentine weed. 



Range : 9, 11, 13, 14, 16. 

 Site: Dry, sun. 

 Fruit: Achene. 

 A small shrub ; flowers in August. 



Gyminda grisebachii, see Gyminda latifolia. 



Gyminda latifolia Sw. False boxwood. 



<?. grisebacMi Sarg. 

 Range: 17, 32. 

 Site : Well-drained, sun. 

 Fruit : Drupe. 

 A large shrub to small tree ; evergreen. 



Gymnocladus dioica (L.) Koch. Kentucky coffeetree. 



Range : 19, 21, 22, 23, 24, 25, 27. 



Site : Well-drained, sun. 



Fruit : Legume ; available in September, persistent unopened through the 

 winter. 



A large tree ; ordinarily occurs in rich soil ; flowers May-June ; root system 

 deep, widespreading ; root nodules not formed ; wind-firm ; wood very durable, 

 used to some extent commercially ; rarely attacked by insects or disease. Seed 

 germination high but irregular and slow, vitality high ; 200-300 seeds per pound. 

 Leaves poisonous to cattle, but cases of poisoning are infrequent, often happening 

 when pods fall into drinking pools. 



Gymnolomia tenuifolia, see Viguiera stenoloba. 



Halesia spp. 



Observations (in addition to specific records) : Gray squirrel. 

 Halesia Carolina L. Silverbell. 



H. tetraptera L., Mohrodendron carolinum Britt. 

 Range : 25, 27, 28, 29, 30. 

 Site: Well-drained, sun, shade. 

 Fruit: Winged capsule. 



A large shrub to small or large tree ; flowers March-April ; rarely attacked 

 by insect pests ; easily storm-damaged ; very ornamental and much cultivated ; 

 propagation is by seed stratified and sown in spring or sown as soon as ripe. 



Halesia diptera Ell. Two-wing silverbell. 



Mohrodendron dipterum Britt 

 Range : 29, 30. 



Site : Well-drained, moist, sun, shade. 

 Fruit: Winged capsule. 

 A small to large tree ; flowers March-April ; propagation as above. 



