102 PITTONIA. 
GRINDELIA DECUMBENS. Stems several, a foot high or 
more, decumbent at base, encircling a tuft of radical leaves, 
the root perennial: radical leaves thinnish, oblanceolate, 
obtuse, 3 to 5-toothed at summit, below tapering very grad- . 
ually to the narrowly winged petiole, this again gradually 
dilated at base: cauline leaves few and small, oblong, acute, 
entire: heads many, rather small, in a corymbose panicle: 
bracts of the subglobose involucre rather few, only the out- 
ermost short ones conspieuously squarrose: rays ample but 
few and remote, only about 10 or 12 to the head: ray- 
achenes trigonous, those of the disk thin and flat, striate; 
the 2 or 3 pappus-awns stout, flat, barbellate above. 
Common on low slopes of the mountains about Cimarron, 
Colorado, 30 Aug., 1896. 
GRINDELIA FASTIGIATA. Stems erect, slender, 2 or 3 feet 
high, at summit narrowly and racemosely or more freely and 
fastigiately branching; the root perennial: radical leaves 
narrowly lanceolate, acute, remotely serrate; cauline of the 
same form but small, occasionally entire: heads small, nearly 
spherical, rayless; the short pedicels clothed with crowded 
squarrose braets confluent with the similar outermost invo- 
lucral ones; inner bracts elongated, not squarrose-tipped: 
outer achenes trigonousand turgid, the inner flat and strongly 
striate; pappus-awns 2 or 3. 
Banks of the Grand River at Grand Junction, Colorado, 
27 Aug., 1896. 
GRINDELIA INORNATA. Stout and low, the several stems 
decumbent, the root perennial: both the short-petioled radi- 
cal and broad-based sessile cauline leaves of oval or obovoid 
outline and saliently serrate-toothed all around, obtuse at 
apex: corymbose-panicled heads large, hemispherical, ray- — 
less: bracts of the involucre numerous, all squarrose: outer — 
achenes only somewhat thicker than the thin inner ones, 9^ 
truncate at su mmit, only very finely striate: pappus-awns 2 
barbellate below the very acute apex, 
