402 COMPOSITiE. Caltcadenia. 



filiform, 2 inches or more in length. Corolla of the disk with a glabrous 

 tube; of the ray with a rather short glandular tube; the ligule very broad, 

 convolute, deeply 3-cleft ; the lateral lobes roundish-cuneiform; the middle 

 one much smaller. 



§ 2. Stem much branched, diffuse, minutely glandular, as well as the involu' 

 ere and upper leaves ; the cup-shaped glands none : rays ^-parted down to 

 the slender tube; the oblons; lobes somewhat equal, spreading : teeth of the 

 disk-corolla [purple in the throat) oblong-linear. — Osmadenia, Nutl. 



5. C. tenella : stem somewhat hairy; the branches slender, divaricate, 

 sparingly leafy, terminated by mostly solitary heads; leaves very narrowly 

 linear, scabrous, setose-hirsute towards the base ; the lower cauline crowded; 

 those of the branches small, acerose-subuiate ; bracts few ; scales of the in- 

 volucre and the chalf of the receptacle ovate-lanceolate, somewhat acumi- 

 nate, covered with small glands ; the latter united ; achenia of the ray gla- 

 brous, rugose; of the disk slightly hairy ; scales of the pappus 8-10 ; the al- 

 ternate ones produced into rigid very scabrous awns, rather shorter than the 

 corolla ; the intermediate ones much shorter, lanceolate-oblong, lacerate-den- 

 ticulate. — Osmadenia tenella, Nutt. ! in trans. Amer. phil. soc. [n. ser.) 7. 

 p. 392. 



St. Diego, California, Nuttall ! May. — Plant 6-12 inches high, erect at 

 the base ; the filiform branches widely spreading. Heads 3 lines long ; the 

 linear-acerose bracts, and the somewhat glutinous involucre and chaff fur- 

 nished with small and flat slightly pedicellate glands. Chaff united nearly 

 to the summit. Rays white, exserted ; the middle division smallest; the 

 fertile achenia apiculate at each end. — The plant is said to exhale a powerful 

 and very agreeable aroma, whence the name imposed by the discoverer. 



139. LAGOPHYLLA. Nutt. in trans. Amer. phil. sod. c. p. ^^d. 



Heads few-flowered ; the ray-flowers about 5, pistillate, ligulate, cunei- 

 form, 3-lobed ; those of the disk 5-6, staminate and pistillate, but sterile by 

 the abortion of the style and ovary. Scales of the involucre 5, similar to the 

 leaves, ovate-lanceolate, the margins infolded and enclosing the ray-achenia. 

 Receptacle flat, fimbrillate-hirsute in the centre, chaffy at the margin be- 

 tween the ray and disk-flowers ; the chaffy scales 5 or 6 in a single series, 

 distinct. Branches of the style in the disk-flowers subulate-filiform, hirsute. 

 Achenia smooth, destitute of pappus ; the fertile narrowly oblong-cuneiform, 

 obcompressed, straight, nearly flat and obscurely angled on the back, carinate- 

 angled anteriorly, and hence' somewhat triangular; those of the disk entirely 

 abortive. — A perennial ? exceedingly branched slender herb, with a smooth 

 and glabrous stem and branches, which are very leafy at the extremity, and 

 terminated by small sessile heads. Leaves alternate, almost imbricated on 

 the branchlets, deciduous, linear-oblong (those of the branches 3-4 lines long), 

 thickish, entire, obtuse, with involute margins, very villous, (as well as the 

 involucre and the summit of the chaff,) especially along the margins, with 

 long and soft white hairs. Rays short and broad, pale yellow. 



L. ramosissima (Nutt. ! 1. c.) 



