98 Rhodora [June 
feel that these constant floral differences should be used as the pri- 
mary characters in distinguishing the species. We present a syn- 
opsis of the North American species as we understand them. With 
these is included one Bolivian species not heretofore recognized. 
KEY ro THE SPECIES. 
A. Ray-flowers purple or roseate-purple. 
B. Dise- and ray-flowers both purple; achene of ray-flower glabrous or 
nearly so, its pappus of a few bristles; leaves short, entire, petioled, 
narrowly deltoid-lanceolate; stem subsimple, strict, the internodes 
elongate......... PELO TA 1. G. purpurea St. John & White. 
B’. Disc-flowers yellow; pappus of ray-flowers of linear-lanceolate fimbriate 
seales; leaves slender-petioled, coarsely serrate, ovate or ovate-lanceo- 
late; stems freely branching. 
C. Pappus of disc-flowers of linear-lanceolate fimbriate scales half the 
length of the corolla, corolla exceeding the achene; ligule oblong, 
3-toothed at apex, its tube exceeding the linear fimbriate pappus- 
scale, the achene of the ray-flower glabrate or hispidulous on one 
HIR ee o dM 2. G. caracasana (DC.) Sch. Bip. 
C’. Pappus of disc-flowers firm, linear, fimbriate, long-aristate, equalling 
the corolla, disc-corolla barely equalling its achene; ligule tripartite, 
the two lateral lobes widely divergent, tube of ray-flower very 
broad, shorter than the glabrate or hispid achene and shorter than 
the linear minutely fimbriate aristate pappus-scale. 
3. G. bicolorata St. John & White. 
A'. Ray-flowers yellowish or whitish. 
D. Pappus of disc-flowers aristate, fimbriate, equalling or nearly equalling 
the corolla; pappus of ray-flowers of linear minutely fimbriate scales 
equalling the tube of the flower, achene of ray-flowers densely hispid 
on the inner face; leaves ovate or ovate-lanceolate, coarsely serrate; 
stems at the nodes and the peduncles with a coarse spreading white 
often glandular hispidity....4. G. aristulata Bicknell. 
D’. Pappus of disc-flowers not aristate; pappus of ray-flowers wanting 
Ve few bristles, their achenes glabrous or minutely pilose on one 
side. 
E. Pappus of disc-flowers linear-lanceolate, conspicuously fimbriate, 
equalling or even exceeding the corollas; pappus of ray-flowers 
wanting, the achenes glabrous or somewhat pilose at summit; a 
freely branching plant with slender-petioled ovate-lanceolate coarsely 
or bluntly serrate leaves; peduncles and stems near the nodes clothed 
with a fine appressed rarely glandular pilosity. 
5. G. parviflora Cav. 
E’. Pappus of disc-flowers linear, fimbriate, two-thirds the length of 
the corolla-tube; pappus of ray-flowers of a few short white bristles 
or wanting, the achenes minutely hispidulous at summit or glabrate; 
a strict plant rarely branching from the base; the internodes elong- 
ate; the leaves short-petioled, linear-lanceolate or narrowly deltoid- 
lanceolate, bluntly serrate to subentire; pedicels and nodes of the 
stem with a coarse partly appressed puberulence. 
6. G. semicalva (Gray) St. John & White. 
1. GALINSOGA purpurea sp. nov. annua tenuis, 1-2.5 dm. alta; 
caulibus subsimplicibus, sparse hispidis, internodiis elongatis; foliis op- 
positis anguste deltoideo-lanceolatis breviter hispidis integris breviter 
petiolatis 1-2 em, longis, 1.5-5 mm. latis; pedicellis hispidis; capitulis 
