1920] St. John and White,—The Genus Galinsoga 99 
pedicellatis globosis parvis 3-4 mm. altis, 2.5-3.5 mm. diametro, 
squamis 4-5 ovatis glabris scariosis flavo-viridibus, receptaculo 
conico, paleis pallidis linearibus anguste bidentatis; floribus radiatis 
femineis purpureis ca. 4, ligulis brevibus oblongis tridentatis, tubis 
pilosis, achaeniis oblanceolato-ovoideis, pappi squamis parvis; flori- 
bus disci hermaphroditis purpureis, tubis infundibuliformibus achaenia 
aequantibus, achaeniis deltoideo-obovoideis hispidis, pappi squamis 
lineari-lanceolatis fimbriatis attenuatis vel aristatis dimidiis vel 
bessibus longitudinis tubarum corollarum. 
A slender annual, 1-2.5 dm. tall: stem nearly simple, sparsely 
hispid; leaves opposite, short-hispid, narrowly deltoid-lanceolate, 
short-petioled, 1-2 cm. long, 1.5-5 mm. broad: pedicels hispid: flower 
heads pedicelled, small, 3-4 mm. high, 2.5-3.5 mm. in diameter; 
involucral scales 4-5, ovate, glabrous, scarious, yellowish-green; 
receptacle conical; chaff pale, linear, narrowly bidentate; ray-flowers 
pistillate, about 4 to a head, the ligules purple, short, oblong, 3- 
toothed, the corolla-tube pilose, the achenes oblanceolate-ovoid, 
pappus of a few bristles; disc-flowers perfect, the tube purple, funnel- 
shaped, as long as the achenes, achenes deltoid-obovoid, hispid, 
pappus-scales linear-lanceolate, attenuate or aristate-fimbriate, half 
or two-thirds the length of the corolla-tube. 
Bourvia: Bolivian Planteau, 1891, Miguel Bang, no. 1,148 (TYPE 
in Gray Herb.). 
2. G. CARACASANA (DC.) Sch. Bip., Linnaea xxxiv, 529 (1865-6). 
Vargasia Caracasana DC., Prodr. v. 676 (1836). 
Native of South and Central America, introduced into eastern 
North America and established especially near the larger cities. 
C. F. Parker found it at Camden, New Jersey, as early as 1870. 
3. G. bicolorata sp. nov. annua ramosa, 2-3 dm. alta; caulibus 
hispidis infra glabratis, nodis superioribus valde hispidis; foliis op- 
positis petiolatis lanceolato-cordatis breviter caudatis grosse obtuse- 
que serratis hispidis, 1.5-4 cm. longis, 4-35 mm. latis; pedunculis 
glanduloso-pilosis; capitulis hemisphaericis, 3-4 mm. altis, 3-5 mm. 
diametro, squamis exterioribus sparse glanduloso-pilosis, receptaculo 
conico, paleis pallide bruneis linearibus minute ciliatis; floribus 
radiatis femineis purpureis, corollis achaenia aequantibus vel vix 
superantibus, ligulis tridentatis cruciformibus dentibus lateralibus 
valde divergentibus, tubis latis pilosis, achaeniis obdeltoideis angu- 
latis hispidis, 2 mm. longis, pappi squamis firmis albidis tubum 
corollae superantibus linearibus longe aristatis fimbriatis; floribus 
disci hermaphroditis, tubis flavis achaenia superantibus, pappi 
squamis firmis albidis linearibus fimbriatis longe aristatis tubum 
corollae aequantibus vel paulo superantibus, achaeniis obdeltoideis 
1.5-2 mm. longis hispidis. 
A branching annual, 2-3 dm. tall: stem glabrate below, hispid at 
the nodes and strongly so above: leaves opposite, petioled, hispid, 
