1S6 PEXTANDRIA. MONOGYNlA. 



This hardy and ornamental genus, within its proper 11- 

 limits, is entirely peculiar to North America, with the so- 

 litary exception of P. sibirica of Northern Asia. 



194. ^COLLOMIA.f 



Calix cy athiform, rather large, border 5-cIeft, 

 acute. Corolla funnelform, 5-lobed, lobes oval- 

 oblong, very short, tube straight, long, and slen- 

 der. Capsule 3-cornered, 3-celled, 3-valved, 3- 

 seeded, valves obcordate. Seed oblong, angu- 

 lar, enveloped by a tenacious mucilaginous in- 

 tegument, (visible when moistened.) 



Annual, leaves alternate, simple, and entire; flowers 

 small and inconspicuous, conglomerated in a terminal fas- 

 cicle, resembling a capitulum, subtended by several brac- 

 tes which are broader than the leaves. 



A genus appertaining to the Natural Order Polemq- 

 afjDEiE and intermediate with PA/o:rand Polenmihim. 



Species. 1. C. linearis. Minutely and pulverulently 

 pubescent; leaves oblong-linear, or sublanceolate; involu- 

 crate leaves ovate-lanceolate, acute; bractes and calix 

 liscid. 



PJilox linearis? Cavan. ic. 6. p. If. t. 527. 



Root fibrous, annual. Stem round, simple, somewhat 

 more pubescent than the leaves, from 4 to 12 inches. 

 Leaves alternate, the lowest pair sometimes opposite, li-^ 

 near-oblong, sessile, with the margin scabrous and some- 

 times revolute, rather thick and opaque, without distinct 

 lateral nerves, after the manner of Phlox, from 10 to 15 

 lines long, 2 or 3 lines wide, and attenuated towards the 

 point, upper and floral leaves wider at the base, somewhat 

 amplexicaule, or ovate-lanceolate, acute, with the base 

 near the capitulum diaphanous, and distinctly nerved, 

 proper bractes ovate, about the length of the calix, viscid 

 and pubescent. Calix cyalhiform, (or in the shape of a 

 wine-glass) rather large and membranaceous Jaelow the 

 incisions, border 5-parted, green, segments semi-lanceo- 

 late, acute, each equally 3-nerved. Corolla monopetalous, 

 slenderly funnelform, 5-lobed, lobes oval-oblong, obtuse, 

 short and s])reading, (only about a line long), tube 

 straight, slender, subcylindric and erect, about twice the 

 length of tb.e calix, widening towards the border, open 



From Kc^?af£lut€?ii in allusion to the character of the seed 



