Naturalisation in Extra-Tropical Countries. 235 



Hydnum imbricatum, Linne. 



In pine-forests of Europe. A wholesome mushroom of delicious 

 taste, which we should endeavour to naturalize in any pine-planta- 

 tions. Other recommendable European species are, H. erinaceum 

 (Persoon), H. album (Persoon), H. diversidens (Fries), H. auriscal- 

 pium (Linne), H. subsquamosum (Batsch), H. lasvigatum (Swartz), 

 H. violascens (Albertini), H. infundibulum (Swartz), H. fuligineo- 

 album (Schmitz), H. graveolens (Brotero), H. Caput Medusae 

 (Nees), H. hystrix (Fries). These and some other edible fungs are 

 given on the authority of Rosenthal's valuable work. The Rev. 

 M. J. Berkeley, Dr. Morren and Dr. Groeppert add Hydnum re- 

 pandum (Linne) and H. suaveolens (Scopoli). 



Hydrangea Thunbergi, Siebold. 



Japan. The leaves of this shrub give a peculiar tea, called the 

 " Tea of Heaven " locally. 



Kydrastis Canadensis, Linne. 



The Yellow Puccooii or Grolden Seal. Eastern North- America. 

 A perennial herb, utilised in medicine. The root contains two 

 alkaloids, berberin and hydrastin. The root-dye is of a brilliant 

 yellow, admitting of its use with indigo for rich green colors. 



Hymenaea Courbaril, Linne. 



Tropical and Southern sub- tropical America. A tree of colossal 

 size and remarkable longevity. Timber hard, extremely heavy, 

 close-grained, used for select wheel-work, treenails, beams and 

 planks, also in various machinery. Courbaril-wood exceeds the 

 British oak four times in elasticity and nearly three times in 

 resistance to fracture [Lapparents] . A fragrant amber-like resin, 

 known as West-Indian Copal, exudes from the stem. The Mexican 

 trade-name of the resin is Coapinole. The beans of the pod are 

 lodged in a mealy pulp of honey-like taste, which can be used for 

 food. The chance of the adaptability of this remarkable tree to 

 the warmer temperate zone needs to be ascertained. This is one 

 of the Algaroba- trees. H. verrucosa (Gaertner) and Trachylobium 

 Petersianum (Klotzsch) yield the best East-African and Mada- 

 gascar-Copal. 



Hymenanthera Banksii, F. v. Mueller. 



South-Eastern Australia, New Zealand, Norfolk-Island. A tall 

 spiny shrub, well adapted for close hedges, where rapid growth is 

 not required. It stands clipping well. Flowers profusely fragrant ; 

 hence this plant is among those best to be chosen for maintaining 

 successively a strong fragrance in gardens of serene climes. 



Hyoscyamus nigrer, Linne. 



The Henbane. Europe, North- Africa, extra-tropical Asia. In 

 Norway indigenous to lat. 63 35'. An important medicinal 



