236 COMPOSITiE. Macronema. 



the Blue Mountains, Nuttall ! — Stem 6-8 inches long, from a low woody 

 base, leafy to the summit. Leaves an inch or more long, about 2 lines wide. 

 Heads large, with about 30 disk-flowers and mostly 8 linear-oblong rays, 

 •' having often the same pubescent stigmas with the discal florets, and not 

 unfrequently the rudiments of stamens." Nutt, Pappus ferruginous. — The 

 heads are not unlike those of Dieteria (Pappochroma) coronopifolia. 



§2. Rays 7canting : achenia very glabrous. (Eugtmna, iViiW.) 



2. M. discoidea (Nutt. ! 1. c.) : young branches tomentose ; leaves sub- 

 spatulate-oblong, obtuse; involucre subtended by 2-3 foliaceous linear-oblong 

 bracts similar to the upper leaves ; the inner scales membranaceous, scari- 

 ous, not appendiculate ; young achenia linear-oblong. 



Banks of Lewis River and other tributaries of the Oregon, Nuttall ! — Re- 

 sembles the preceding. Leaves about an inch long, 2-3 lines wide. Heads 

 25-flowered. 



44. ERICAMERIA. Nutt. in trans. Amer. pliil. soc. («. ser.) 7. p. 318. 



Heads few-flowered ; the ray-flowers 3-6, ligulate, pistillate ; those of the 

 disk 7-9, tubular, perfect. Scales of the turbinate or cyHndrical involucre 

 few, imbricated, carinate-concave, chartaceous with scarious margins ; the 

 outermost short and subulate, fleshy, passing into the leaves. Receptacle 

 small, alveolate. Corolla with a slender tube ; that of the disk infundibuli- 

 form at the summit, 5-toothed. Branches of the style linear-subulate, the 

 hirsute acute appendages much longer than the stigmatic portion. Achenia 

 linear, slender, terete, mostly glabrous. Pappus of copious capillary bris- 

 tles, entirely similar but unequal. — Dwarf and often resinous shrubby plants 

 (natives of Oregon & California), exceedingly branched and leafy, with the 

 aspect of Heaths. Leaves acerose or linear-subulate, crowded and fascicled, 

 persistent. Heads small, corymbose at the extremity of the branchlets. 

 Flowers yellow. 



1. E. microphylla (Nutt. ! 1. c.) : somewhat pubescent, scarcely glutinous ; 

 leaves terete, obtuse, very short, much fascicled ; rays 3-4 ; inner scales of 

 the involucre oblong, obtuse ; achenia glabrous. — Diplopappus ericoides, 

 Less., in Linncsa! 6. p. 117. Aplopappus ericoides. Hook. Sf Am. hot. 

 Beechey, p. 146 ; DC! prodr. 5. p. 346. 



California, on rocks, Chamisso! Douglas! Nuttall! S^'c. — Shrub 6-12 

 inches high, at first cinereous-pubescent: the leaves 3-5 lines long, not 

 unlike those of Adenostoma. 



2. E. nana (Nutt. I 1. c.) : glabrous, somewhat glutinous; leaves linear- 

 acerose, acute, channelled ; rays about 4 ; scales of the involucre lanceolate, 

 acute; achenia minutely hairy, somewhat compressed. 



On shelving rocks in the Blue Mountains of Oregon, Nuttall! — Shrub 

 scarcely a span high, densely branched, fastigiate, brittle : the rigid leaves 

 6-12 lines long. Pappus not very copious, in 2 series, somewhat deciduous. 



3. E. resinosa (Nutt.! 1. c.) : glabrous, glutinous; branches slender, co- 

 rymbose at the summit; leaves subulate-linear, acute, tapering to the base ; 

 rays about 6 ; the disk-flowers about 12 ; the limb of the corolla deeply 

 6-cleft ; scales of the involucre lanceolate, acute ; achenia hirsute when 

 young. 



