492 



ONAGRACEAE. 



[Vol.. II. 



ii. HARTMANNIA Spach, Hist. Veg. 4: 370. 1835. 



Annual or perennial caulescent herbs with branched stems. Leaves alternate, commonly 

 pinnatifid or lyrate; buds drooping. Flowers perfect, white, red or purple, diurnal, in ter- 

 minal spikes or racemes. Calyx-tube funnelform; calyx-segments narrow, deciduous, their 

 tips mostly free in the bud. Petals 4, spreading. Stamens 8, the alternate ones longer; fila- 

 ments filiform; anthers linear. Ovary elongated, 4-celled; stigma 4-cleft; ovules numerous 

 on slender stalks, in many rows. Capsules club-shaped, 4-winged, sessile or stalked. Seeds 

 numerous, not tuberculate. [In honor of Emanuel Hartmann, a resident of Louisiana.] 



About 10 species, in North and South America. 



i. Hartmannia specidsa (Nutt.) Small. 

 Showy Primrose. (Fig. 2594.) 



OE, speciosa Nutt Journ. Acad. Phil. 2: 119. 1821. 

 Hartmannia speciosa Small, Bull. Torr. Club, 23: 



181. 1896. 



Erect, ascending or decumbent, more or less 

 branched, 6'-3 high, puberulent or finely pu- 

 bescent. Stem-leaves lanceolate or linear-lanceo- 

 late, sessile, or short-petioled, acutish, sinuate 

 or pinnatifid, 2 / -3 / long; basal leaves slender- 

 petioled, oval or oval -lanceolate, repand or pin- 

 natifid at the base; flowers white or pink, \% f - 

 3%' broad, generally few, loosely spicate; petals 

 broadly obovate, emarginate; calyx-lobes ovate- 

 lanceolate, acuminate, spreading, the tube rather 

 longer than the ovary; capsule club-shaped, 

 strongly 4-ribbed, 4-winged, pubescent, 6 // ~9" 

 long, on a short stout pedicel. 



Prairies, Missouri and Kansas to Louisiana, Texas, 

 Arizona and northern Mexico. May-July. Exten- 

 sively naturalized in South Carolina and Georgia. 



12. PACHYLOPHUS Spach, Hist. Veg. 4: 365. 1835. 



Perennial acaulescent or nearly acaulescent herbs. Leaves basal, leathery, pinnatifid or 

 pinnately-toothed, petioled. Flowers basal, more or less tufted. Calyx pubescent, its tube 

 linear-funnelform, its segments narrow, 2-3 times shorter than the tube. Petals white or 

 pink, spreading. Stamens 8; filaments filiform, the alternate ones longer; anthers linear. 

 United styles filiform; stigma 4-cleft. Capsules basal, woody, pyramidal, its angles retuse 

 or obtuse, transversely wrinkled. Seeds sessile, in I or 2 rows, deeply furrowed along the 

 raphe. [Greek, referring to the tuberculate edges of the valves of the capsule.] 



A monotypic genus of western North America. 



i. Pachylophus caespitdsa (Nutt.) Raimann. 



(Fig. 2595.) 



OEnothera caespilosa Nutt. Fras. Cat 1813. 

 OEnothera scapigera Pursh, Fl. Am. Sept. 263. 1814. 

 Pachylophus caespitosa Raimann in Engl. & Prantl, 



Nat Pfl. Fam. 3: Abt. 7, 215. 1893. 



Acaulescent or nearly so, perennial or biennial 

 from a thick woody root. Leaves clustered at 

 the base, narrowed into a slender petiole, lanceo- 

 late, oblanceolate or oval, acutish at the apex, 

 densely pubescent, sinuate-dentate, often densely 

 ciliate with white hairs, repand or pinnatifid, 3'- 

 8' long, usually less than i' wide; flowers few, 

 white or rose, 1%'-$' broad; petals obcordate; 

 lobes of the calyx pubescent, narrowly lanceolate, 

 reflexed -spreading, its tube 2 / -7 / long, dilated at 

 the mouth, many times longer than the ovary; 

 capsule sessile, ovoid, strongly tuberculate on 

 each side, the angles ribbed; seeds densely and 

 minutely tuberculate. 



Nebraska and Montana to the Northwest Territory, 

 south to Nevada, New Mexico and Sonora. June-July. 



Scapose Primrose. 



