boreale, Nutt., which is also Arctic American, but does not 

 extend so far to the southward along the Eocky Mountains ; 

 it extends, however, further to the west, inhabiting the 

 arctic regions of Asia, as also further east, to Northern 

 Canada and the Alleghany Mountains. It is very similar to 

 H. Maclcenzii, but has distinctly nerved leaves and shorter 

 calyx segments ; it has been in cultivation at Kew. 



H. Machenzii flowers annually in the Herbaceous Ground 

 at Kew in July and August. 



Descr. A herb with perennial rootstock, or slender under- 

 shrub, clothed with appressed minute strict grey hairs with 

 roughened surfaces ; branches very slender, decumbent, ascend- 

 ing and straggling. Leaves four to six inches long, petiole 

 very slender, leaflets five to seven pairs with an odd one, 

 hardly petiolulate, one half to one inch long, oblong or ob- 

 ovate- or linear-oolong, rounded or retuse at the tip, nerve- 

 less ; stipules minute, membranous, subulate-lanceolate, usually 

 united below. Raceme slender, usually long-peduncled, 

 strict, many -flowered. Flowers scattered, three-fourths to 

 one inch long, horizontal or ascending or drooping, rose- 

 purple, pedicels short ; bracts minute, deciduous. Calyx one- 

 sixth to one-fourth of an inch long, silvery-hoary, tube short, 

 rounded at the base ; segments subulate-lanceolate. Standard 

 obovate, notched, reflexed beyond the middle ; wings linear- 

 oblong, obtuse, shorter than the keel, which is obliquely trun- 

 cate. Pod one to two inches long, of four to seven orbicular 

 flattened deeply-veined joints with crenate margins. 



J. D. H. 



FlgB. 1 and 2, Standards; 3, wings and keel; 4, calyx and stamens; 5 and 6, 

 anthers; ?, calyx and ovary; 8, pod ; !>, the same laid open: — all but HanilV 

 enlargtd. 



