126 The Pappus of Microseris. [ ZOE 
Polygonum nodosum is often seen in rich damp soil, and still more 
frequently P. avicu/are in cultivated grounds and in. yards, where 
no frequent tramping of feet is able to destroy it. Two species of 
Rumex, &. conglomeratus and R. crispus, are common in damp 
soil, in both neglected and cultivated grounds. 
THE PAPPUS OF MICROSERIS. 
BY T. S. BRANDEGEE. 
No botanist seems to have observed that the awns of the pappus 
of Microseris develop much earlier than the paleze, but any one hav- 
ing specimens of either JZ. /inearifolia Gray or M. Lindleyi (DC), 
with heads in different stages of growth, from bud to maturity, may 
see that in these two species and probably in all others of a similar 
structure, the awns have already attained their full length when 
the flower opens; while the palez, then many times shorter, increase 
gradually in length until the seed is mature, at which time they 
equal or exceed the awns. 
This fact has an important bearing upon several obscure species, 
founded upon immature specimens and differing from the two men- 
tioned above only in the greater length of the awns as compared 
with the palez. 
M. ( Calais) macrocheta Gray was described from Oregon, but 
has since been collected all the way to San Diego. Dr. Gray says, 
‘Mature fruit still unknown.’’* It is probably young /inearifolia, 
to which also belongs, judging by a specimen kindly furnished by 
Mr. H. C. Ford, the collector, JZ anomala Watson, Proc. Am. 
Acad., xxii, 475, and xxiv, 84, where Dr. Watson himself reduces it 
to M. macrocheia. 
M. ( Calais) Parryi Gray from San Diego, appears, by the chiar. 
acter “ Scales of the involucre, broader and more blunt [than in JZ 
macrocheta|, and awn of the pappus shorter and more denticulate,”’t 
to be an immature state of MZ. Lindleyi. 
_ The three other species in this section ( Calocalais DC.) probably 
all belong to Lindleyi. Calais Kelloggiit Greene, from the vicin- 
ity of San Francisco, is identical with it; C. Clevelandi§ Greene, 
*Syn. FI. ii, pt. i, 418. : 
tMex. Bound. Surv., ii, 104. _ 
TBull. Cal. Acad., ii, 49. 
§Bull. Cal. Acad., ii, 49 (under name C, Pov: by. th; 153. 
