SCROPHULARIACEAE (FIGWORT FAMILY) 437 



prismatic: capsule ovoid, spinose-prickly, 4-5 cm. high. An introduced weed 

 in fields and waste places. 



2. Datura Stramonium L. Sp. PI. 179. 1753. Quite similar but less pu- 

 bescent; stem stouter, green: leaves ovate, acute or acuminate, narrowed at 

 base, sinuate or angulate toothed: flowers white: calyx half as long as the 

 corolla: capsule as in the preceding. JAMESTOWN or JIMSON WEED. Fre- 

 quent as an introduction about old buildings and in barn lots. 



3. Datura meteloides DC. Prodr. 13: 544. 1852. Pruinose-glaucescent 

 with minute puberulence or pubescence: leaves unequally ovate, repand to 

 entire: calyx cylindrical, about 7.5 cm. long: corolla white or suffused with 

 violet, sweet-scented, 1.5-2 dm. long: pod thickly armed with short equal 

 prickles, nodding on the short peduncle. Extending through Colorado; 

 probably indigenous in the southern portion, as it is in the Texas- Arizona belt. 



/ 



6. NICOTIANA L. TOBACCO 



Acrid-narcotic mostly clammy-pubescent herbs, with ample leaves and 

 racemed or .panicled flowers. Calyx tubular-campanulate, 5-cleft. Corolla 

 funnelform or salverform, usually with a long tube and 5-lobed plaited border. 

 Stigma capitate. Capsule 2-celled, 2-4-valved from the apex. Seeds nu- 

 merous, minute. 



Stem leaves petioled .:.; . 1. N. attenuata. 



Stem leaves sessile . . . . . . . f ,,, . 2. N. trigonophylla. 



1. Nicotiana attenuata Torr. in Wats. Bot. King's Exped. 276. 1871. Stem 

 3-5 dm. high: leaves all on naked and mostly slender petioles, acute or sub- 

 obtuse at base; the lower ovate or oblong; the upper oblong-lanceolate and 

 attenuate-acuminate to linear-lanceolate or linear: corolla dull white or 

 greenish, slender salverform, not enlarged at the throat; the tube 3-4 cm. 

 long; the limb 8-10 mm. broad: filaments equally inserted low down on the 

 tube. In dry ground; from Colorado to Idaho and California. 



2. Nicotiana trigonophylla Dunal, in DC. Prodr. 13: 562. 1852. Viscid- 

 pubescent, 4-6 dm. high: leaves sessile or the lower tapering to a winged 

 petiole, obovate-oblong to oblong-lanceolate, sometimes with a cordate or 

 auricled base, 3-10 cm. long: inflorescence at length loosely paniculate- 

 racemose: corolla greenish-white or yellowish, about 18 mm. long, somewhat 

 pubescent, the sinuately-lobed limb about 8 mm. broad. Probably extend- 

 ing into southern Colorado from Texas and New Mexico. 



104. SCROPHULARIACEAE Lindl. FIGWORT FAMILY 



Herbs, shrubs, or rarely trees (ours herbs or rarely shrubs) with exstipulate 

 leaves. Calyx variously toothed, cleft, or parted. Corolla sympetalous (rarely 

 wanting), more or less irregular, the limb 2-lipped or nearly entire and the 

 lobes imbricated in the bud. Stamens didynamous (or perfect stamens only 2, 

 rarely 5), inserted on the corolla-tube and alternate with the lobes; the anther 

 pacs sometimes unequal, or confluent, or reduced to one. Pistil 1; the ovary 

 2-celled, becoming a 2-celled many-seeded capsule with central placentae. 



Anther-bearing stamens 5; leaves alternate . . . . .1. Verbascum, 



Anther bearing stamens 4 or 2. 



Corolla spurred or saccate at base on the lower side . . .2. Linaria. 

 Corolla not spurred, but sometimes somewhat ventricose or gibbous. 

 Stamens 5, four anther bearing, the fifth often rudimentary. 



Sterile stamen reduced to a scale or gland on the upper side of 



the corolla-* ube 

 Small annuals; peduncles 1 -flowered; corolla gibbous at base; 



seeds solitary or few '. 3. Collinsia. 



Coarse perennials; peduncles several-flowered; corolla some- 

 what ventricose; seeds numerous 4 Scrophularia 



