MONOPETALOUS EXOGENOUS PLANTS. . 330 



** Leaves veiny, oblong or lanceolate ; the lowest narrowed at the base, the vpper 

 sessile ; achenia obovate, cojnjn'essed. 



C. Mariana, ISTutt. Perennial; stem simi3le, covered 

 Avitli loose silky deciduous hairs ; lowest leaves spatulate-ob- 

 long, entire or slightly serrate, the upper ones lanceolate, 

 sessile, entire ; corymb small, mostly simple and umbel- 

 late, cone-like in the bud ; peduncles and involucre glan- 

 dular. Stem l°-2° high. 



BAOCHARIS, L. 



Heads dioecious, many-flowered, i\\Q flowers all tubular; 

 corolla of the sterile flowers 5-cleft; of the fertile ones lili- 

 form, nearly entire, without anthers; ^^yZe exserted ; scales 

 of the oblong or hemispherical involucre imbricated in 

 several rows ; receptacle naked or somewhat chaffy ; achenia 

 ribbed ; pappus of the sterile flowers capillary, in a single 

 row, as long as the involucre; of the fertile flowers in 

 1-several rows, commonly much longer than the involucre. 

 — Smooth and resinous shrubs; leaves alternate; flowers 

 white. 



B. halimifolia, L. Branches angled; leaves obovate, 

 or oblong-obovate, toothed above the middle, the upper- 

 most lanceolate, entire ; heads peduncled, the terminal ones 

 clustered; pappus of the fertile flowers 3-4 times as long 

 as the mY o\\JiCYQ.—Shrub, 2°-12° hioh. 



B. GLOMERULIFLORA, Pers. Branches angled; leaves 

 wedge-obovate, coarsely-toothed, rigid, the uppermost obo- 

 vate, entire; heads very numerous, in dense sessile axillary 

 clusters; pappus of the fertile flowers twice as long as the 

 mYolwQve.— Shrub, 6°-12° high. 



B. ANGUSTiroLiA, Miclix. Branches numerous, angled; 

 leaves linear, entire; heads single, or 2-4 in a terminal 

 cluster; achenia smooth. — Shricb, 4°-8° high ; heads small. 



