Genus i. 



PRI.MROSE FAMILY. 



709 



3. Primula egaliksensis Ilornem. Greenland 

 Primrose. Fig. 3283. 

 Primula egaliksensis Hornem. Fl. Dan. pi. if 11, 1814. 



Leaves green both sides, oval or lance-ovate, entire, or 

 slightly undulate, obtuse or obtusish at the apex, F-i' long, 

 narrowed into petioles of about their own length; scape 

 very slender, 2'-6' high ; umbels 2-6-flowered ; bracts of the 

 involucre lanceolate, acuminate; pedicels short, elongating 

 in fruit; calyx-teeth short, acute; corolla-lobes l"-2" long, 

 much shorter than the tube, obovate, sometimes cleft to the 

 middle ; capsule erect, about 3" high, longer than the calyx. 



Northern Labrador (Turner, according to A. Gray) and 

 Greenland. Summer. 



Several other boreal species have been described, but they 

 are not definitely known within our range. 



2. ANDROSACE [Tourn.] L. Sp. PI. 141. 1753. 



Low annual or perennial herbs, our species scapose, with tufted small basal leaves, and 

 terminal umbellate or solitary involucrate small white or pink flowers. Calyx persistent, 

 S-lobed, -cleft or -parted, the lobes erect in flower, sometimes spreading in fruit. Corolla 

 salverform or funnelform, the tube short, not longer than the calyx, the limb S-lobed, the 

 lobes imbricated. Stamens 5. included, inserted on the tube of the corolla ; filaments very 

 short ; anthers short, oblong, obtuse. Ovary superior, turbinate or globose ; ovules few, or 

 numerous, amphitropous ; style short; stigma capitellate. Capsule turbinate, ovoid or globose, 

 5-valved from the apex, few-many-seeded. [Greek, man's shield, from the shape of the leaf 

 in some species.] 



About 60 species, natives of the northern hemisphere. Besides the following, about 15 others 

 occur in western and northwestern North America. Type species : Androsace maxima L. 



I. Androsace occidentalis Pursh. Androsace. 

 Fig. 3284. 



Androsace occidentalis Pursh, FI. Am. Sept. 137. 1814. 



Annual, minutely pubescent, or glabrate ; scapes fili- 

 form, solitary or numerous from fibrous roots, erect 

 or ascending, or diffuse, I's' long. Leaves oblong or 

 spatnlate, obtuse, entire, sessile, 3"-8" long; bracts of 

 the involucre similar to the leaves but much smaller, 

 i"-3" long; pedicels several or numerous, filiform, 2"-6" 

 long in flower, often becoming l' long in fruit ; calyx- 

 tube obpyramidal in fruit, the lobes ovate or triangular- 

 lanceolate, acute, as long as or longer than the tube, 

 green, becoming f oliaceous ; corolla very small, white, 

 shorter than the calyx ; calyx longer than the several- 

 seeded capsule. 



In' dry soil. Minnesota and Illinois to Kansas and Arkan- 

 sas, west to Manitoba, Utah and New Mexico. April-June. 



Androsace diffusa Small, differing by narrower, lanceolate involucral bracts, enters our extreme 

 northwestern limits in North Dakota. 



3. HOTTONIA Boerh.: L. Sp. PI. 145. 1753. 



Aquatic glabrous herbs, rooting in the mud, or floating, with large pinnatifid submersed 

 crowded leaves, and small white or purplish flowers, racemose-verticillate on bracted hollow 

 erect emersed peduncles. Calyx deeply 5-parted, the lobes linear, imbricated, persistent. 

 Corolla salverform, the tube short, the limb 5-parted, the lobes spreading, imbricated at least 

 in the bud. Stamens 5, included, inserted on the tube of the corolla; filaments short; 

 anthers oblong. Ovary ovoid; style filiform; stigma minute, capitate; ovules numerous, 

 anatropous. Capsule subglobose, 5-valved. Seeds ellipsoid, numerous. [Dedicated to Peter 

 Hotton, 1648-1709, professor at Leyden.] 



Two species, the following of eastern North America, the other, the typical one, of Europe and 

 eastern Asia. 



