140 MISC. PUBLICATION 303, U. S. DEFT. OF AGRICULTURE 



Heliomeris tenuifolia, see Viguiera stenoloba. 



Herpothamnus crassifolius, see Vaccinium crassifolium. 



Hesperodoria scopulorum, see Aplopappus scopulorum. 



Hesperopeuce mertensiana, see Tsuga mertensiana. 



Heteromeles arbutifolia, see Photinia arbutifolia. 



Heteromeles salicifolia, see Photinia arbutifolia. 



Heyderia decurrens, see Libocedrus decurrens. 



Hicoria alba, see Carya alba. 



Hicoria aquatica, see Carya aquatica. 



Hicoria buckleyi, see Carya buckleyi. 



Hicoria carolinae-septentrionalis, see Carya caroUnae-septentrionalis. 



Hicoria cordiformis, see Carya cordiformis. 



Hicoria fernowiana, see Carya myristioaeformis. 



Hicoria floridana, see Carya floridana. 



Hicoria glabra, see Carya glabra. 



Hicoria laciniosa, see Carya laciniosa. 



Hicoria leiodermis, see Carya leiodermis. 



Hicoria microcarpa, see Carya microcarpa. 



Hicoria minima, see Carya cordiformis. 



Hicoria myristicaeformis, see Carya myristicaeformis. 



Hicoria ovalis, see Carya ovalis. 



Hicoria ovata, see Carya ovata. 



Hicoria pallida, see Carya pallida. 



Hicoria pecan, see Carya pecan. 



Hicoria sulcata, see Carya laciniosa. 



Hicoria texana, see Carya texana. 



Hicoria villosa, see Carya villosa. 



Hoffmanseggia microphylla Torr. 



Range: 10. 



Site : Dry, well-drained, sun. 



Fruit : Legume. 



A small to large shrub ; flowers in April ; stems rustlike, forming a broad, 

 rounded bush ; commonly occurs in sandy soils. 



Holacantha emoryi Gray. Crucifixion thorn. 



Range: 10, 11. 



Site : Dry, sun. 



Fruit; Nutlike drupe. 



A large dioecious, thorny, rigid, much-branched, nearly leafless shrub ; fruit- 

 ing clusters very dense. 



Holodiscus spp. 



Propagation of all species is by seed sown in the fall. 

 Observations (in addition to specific records) : Relished by Olympic wapiti. 



Holodiscus discolor (Pursh) Maxim. Oceanspray. 



Spiraea discolor Pursh, Sericotheca discolor (Pursh) Rydb. Schizonotus 

 discolor (Pursh) Raf. 

 Range: 1, 2, 4, 5, 12. 

 Site: Dry, well-drained, sun. 

 Fruit: Follicle. 



A large bushy shrub ; flowers May-July ; often pioneers in burned-over areas. 

 Var. microphyllus (Rydb.) Jeps. (H. microphyllus Rydb., Sericotheca micro- 

 phylla Rydb, ) , occurring in regions 4, 12, and 13, is a dwarf form. 



