312 Coreopside(B and Tagetinem. [zoe 



Bot., vii, 410 (Brazil), said by the author to be very near P. lineare; 

 P. latifolmm Benth., Hooker Jour. Bot., ii, 44 (British Guiana); P. 

 caesium Casar., Walp. Rep., vi, 722 (Brazil); P. amplexicanle En- 

 gelm., PL Wright, i, 120; P. scoparhmi and P. GreggiiQx^y, PI. 

 Wright, i, 119-20, the latter species reduced afterward by the au- 

 thor in Syn. Flora, vol. i, pt. 2, 355, to both P, gracile and P. sco- 

 parmm; P.filifolimn and P. Ervendbergii Gray, Proc. Am. Acad., 

 xix, 35, wh^re he reduces P. Lindenilo P. viridifloriwi; P. tage- 

 toides to P. coloratum, and suggests the older specific name suffrut- 

 icosum for P. linifolium "mainly" and for P. deaunbens. The 

 latest species proposed is P. crassifolium Watson, collected by Dr. 

 Palmer on the mainland of Lower California and also on Carmen 

 Island in the Gulf. Hemsley in Biologia Centrali-American, accepts 

 the conclusions of Dr. Gray as to the Mexican species, evidendy 

 without study of the material at his command, a defect which is too 

 apparent nearly throughout the botanical part of the work. 



_ It is plain from the above that the genus is much in need of re- 

 vision. The few notes given below are contributed in the hope of 

 making some of the species of our southern border better known. 

 The species are separated apparently by such slight and variable 

 characters that any competent revision would probably reduce them 

 one-half at least. One of the organs generally overlooked in Com- 

 positc-e the "nectary," may be of some assistance in diagnosis, per- 

 haps also the base of the style. 



_ The color of the involucres, and to a certain extent the propor- 

 tions of the corolla, appear to be of little importance. They cer- 

 tainly fail in our best known and most widely spread species P. 

 graczle This plant from Magdalena Bay, the original locality, is a 

 woody-based perennial, a foot to eighteen inches high, growing in 

 dense clumps; involucre smooth, greenish or purplish ; corolla pale, 

 one segment much more deeply cut than the others ; proper tube a 

 htde shorter than the remainder of the flower; throat moderately 

 dilated; akenes all ahke and free, narrowed at the top, equaling the' 

 yellowish pappus and nearly equaling the corolla. The Californian 

 specimens accord well enough with this and show similar variations 



n ««r '.l-u' '''^''^""''' ^"' ^" ^ ^P^^^"^^" <^«"^cted by Pringle 



nb. f ?l! n "'"' '^"'■'^""'" "^^ ^"^"-^ Pl-nt is glaucous, the 



tube of the corolla equals or exceeds the throat and Ihnb; and the 



andTh Tt! 'l'"'''""'' ^^^ ^^^^^^"^^' "PP^^ P^-^^t of the filament 

 and the lobes of the corolla are studded with very minute glands. 



