7<H FLORA. 



spreading, much enlarged in fruit, destitute of appendages. Corolla campanulate 

 or nearly cylindric, shorter than or slightly exceeding the calyx, usually with 5 

 minute appendages on the tube within, its lobes convolute in the bud. Stamens 

 included. < >vary i-celled; styles united below; ovules 2-4 on each of the placen- 

 ta,'. [Greek, large calyx.] About 3 species, natives of N. Am. 



1. Macrocalyx Nyctelea (L.) Kuntze. Nyctelea. (I. F. f. 3001.) Spar- 

 ingly hirsute-pubescent; stem forked, 1-3 dm. high. Leaves pinnately divided, 

 peti iled, 4-10 cm. long, ovate-oblong in outline, the upper alternate, the lower oppo- 

 site, the segments oblong or lanceolate; peduncles i-flowered, opposite the leaves; 

 calyx in flower about 4 mm. long, about equalling the corolla, enlarging, widely 

 spreading and becoming 15-30 mm. broad in fruit, its lobes lanceolate or ovate- 

 lanceolate, acuminate; fruit at length pendulous; capsule globose. In moist soil, 

 N. J. to Minn., the N. W. Terr., Va., Neb. and Kans. April-July. 



4. PHACELIA Juss. 



Mostly hirsute hispid or scabrous herbs, with alternate leaves, the lowest rarely 

 opposite, and blue, purple, violet or white flowers in terminal scorpioid cymes or 

 racemes. Calyx 5-lobed, somewhat enlarging in fruit; sinuses not appendaged. 

 Corolla-tube sometimes appendaged within, opposite the lobes, the lobes imbricated 

 in the bud. Stamens attached near the base of the corolla; anthers mostly ovate. 

 Ovary 1 -celled, the 2 placenta? narrow, affixed to the walls; styles united below. 

 Capsule i-celled, or falsely nearly 2-celled, 2-valved. Seeds usually reticulated. 

 [Greek, a cluster, referring to the clustered flowers.] About 80 species, natives 

 of the New World. Besides the following, some 50 others occur in western N. Am. 



Corolla-lobes entire. 



Corolla manifestly appendaged within, between the stamens. 



Leaves entire. 1. P. leucophylla. 



Leaves crenate-dentate. 2. P. i?itegrifolia. 



Leaves pinnately divided, or pinnatifid, the segments incised. 

 Racemes loose; pedicels slender; ovules 2 on each placenta. 



3. P. bipinnatifida. 

 Racemes dense; pedicels short; ovules numerous. 4. P. Franklinii. 



Appendages of the corolla inconspicuous or none. 

 Filaments pubescent; calyx-lobes oblong. 



Puberulent; flowers 8-10 mm. broad. 5. P. dubia. 



Hirsute; flowers 12-14 mm. broad. 6. P. hirsuta. 



Filaments glabrous; calyx-lobes linear. 7. P. Covillei. 



Corolla nearly rotate, its lobes fimbriate. 



Lobes of the leaves and calyx acute. 8. P. Purshii. 



Lobes of the leaves and calyx obtuse. 9. P.fimbriata. 



1. Phacelia leucophylla Torr. Silky Phacelia. (I. F. f. 3002.) Peren- 

 nial by a stout rootstock, pale, densely silky-pubescent. Stem 3-5 dm. high; 

 leaves lanceolate to oblong, 5-10 cm. long, the lower long-petioled; spike-like 

 branches of the scorpioid cymes dense, 2-8 cm. long; flowers sessile, numerous, 

 about 8 mm. high; calyx-lobes hispid, oblong-lanceolate or linear, somewhat 

 shorter than tin white or bluish. 5-lobed corolla; corolla-appendages in pairs 



11 the filaments; filaments exserted, glabrous or sparingly hairy; ovules 2 on 

 each placenta. In dry soil, S. Dak. to Idaho and Neb. May-Aug. 



2. Phacelia integrifolia Torr. Crenate-leaved Phacelia. (I. F. f. 

 3003.) Annual or biennial; stem very leafy, 1. 5-5 dm. high. Leaves finely 

 strigose-pubescent, ovate-oblong or oblong-lanceolate, irregularly crenate-dentate, 



. rounded or cordate at the base, 2-6 cm, long, petioled or the 

 upperm ; spike-like branches of the scorpioid cymes dense, 5-10 cm. 



long when expanded; flower- sessile, about 8 mm. long; calyx-segments acute; 

 corolla tubular-campanulate, white or blue, its tube longer than the calyx; filaments 

 glabrous, exserted; ovules 2 on each placenta. In saline soil, Kans. and Colo, to 

 .. I ftah and Ariz. April Sept 



3. Phacelia bipinnatifida Michx. Loose flowered Phacelia. (I. F. f. 

 3004.) Biennial, hirsute pubescent ; stem glandular-viscid above, 3-6 dm. high. 



ader petioled, 5-13 cm. long, pinnately divided or deeply pinnatifid 



