337 



plate of tlie same. The style tii)8 arc poculiar for the genus, being long and 

 filiform. 



I have grown this species in my grounds from seed. It is a rank, weedy look- 

 ing ]ilaut, with rather coarse foliage. Some of the larger specimens reach the 

 height of 7 feet. None of the plants bloomed out of doors, but they had budded 

 when killed by frost the Ist of November. A small specimen was saved and 

 transjdanrcd to the greenhouse and Howered about the middle of December. 

 The lloweis nrv very attractive and are fully 2 inches in diameter. The chief 

 ohjcction to tJie i)]ant is its very late blooming, being several weeks later than 

 the commonly cultivated species. The flow(;ring continues for several months. 

 Bideiis pilosa L. Sp. PI. ii. 832 (1753). In shade along river bottoms. Colima, 

 January 9 to February 6, 1891. No. 1169. 



Bidens bipiiinata J^. Ibrm. Awns divergent. Mauzanillo, December I to 31, 1890. 



\o. 91>3. Near Palmer's No. 131 (1885) from S. W. Chihuahua. 

 Galiiisoga parviflora Cav. Ic. iii. 41, t. 281 (1794). Only a few ]dants seen in a river 



bottom. Colima, January 9 to February 6, 1891. No. 1244. 

 Galea urticaefolia DC. Prod. v. 674 (1830); Cahacte nrticifolia K. Br. Trans. Linn. 

 Soc.xii. 109(1818). Four to eight feet high. A very common plant about 

 Colima, January 9 to February 6, 1891. No. 1215. 

 Tridax dubia Rose , sp. cov. A slender and more or less procumbent herb, somewhat 

 hirsute : leaves opjxjsite, ovate to lanceolate, serrate : iuHorescence afcw-dowered 

 corymb; pedicels variable in length, sometimes 2 to 3 inches long: invohicral 

 bracts 5, distinct, herbaceous, ovate, acute: rays yellow, 5, fertile, 3-toothed; 

 disk flowers perfect, fertile : pappus of 10 oblong, obtuse, ciliate-pectinate 

 palic: akeu<>s slightly llatt<!ncd diu'sally, a little pilose. — Along the river bot- 

 tom ; not common. Colima, January 9 to Febniary 6, 1891. No. 1173. 

 For illustration see PI. xxxiii. 



This species is doubtfully referre<l to Tridax, from which it differs in its less 

 simple iuflores<'ence, involucral bracts iu a single series, and fertile rays, and in 

 the character of the pappus. 



Mr, Wm, M. Canby, wtio has been very much interested in the plants, writes 

 me as follows: "The plant clearly belongs where you place it, viz, in subtribe 

 (Talhisoijcw, of tribe Jfelia>ithoide(v. Beutham and Hooker give but 7 genera 

 in this subtribcand thisplautis nearly related to but two of these, HaUntsoga and 

 Tridax, and does not fully agree with either. Oji the whole, however, it seems 

 to me to be sufiiciently near Tvidax to bo taken into it. In the detailed generic 

 description of Beutham and Hooker is the phrase concerning the jiapptis of 

 'aristato-acuminatic' If this were loft out you would not have uuicb difiiculty 

 inbriugiug your plant into it. Now, in Tridax trilohata (which has been put mider 

 Galinsoija by good botanists) you liave a pappus which is really nearer that of 

 your plant than of other species of TnrfrtJ-, Beutham and Hooker suppress, I 

 think, with reason, all the genera which have been found to accouunodato spe- 

 cies not Just Tncku; or tta//Hso,*/a ami unite them with the former. Your plant 

 is much like the original species of Tridax (T. procumbcns) in the receptacle, 

 chaff, and scales of the involucre. It approaches T. iriJobata iu the pappus. 

 It seems to mo that the simple lact of its having a definite number of ]tap])i 

 which are only <;iIiate-pectinato instead of plumose-ciliato and which are not 

 aristato should not take it out of a genus in which there is as much variation 

 in species as in Tridax.^' 

 Tridax procumbens L. Sp. PI. ii. 900 (1753). Colima, January 9 to February 6, 



1891. No. 1183. 

 Flaveria robusta Koso, sp. nov. About 4 feet high, pubescent or glabrate below: 

 leaves lanceolate or linear above, 3 to 5 inches long, acute to acuminate, taper- 

 ing into a slender petiole, S-norved, entire or slightly serrate : inflorescence open, 

 corymbose ; heads small, with 3 mvolucral bracts; tlowers 3; ray 1, objcular, 



