334 ONAGRACEAE (EVENING PRIMROSE FAMILY) 



out: flowers large, 5-10 mm. broad: stamens all with similar and perfect 

 anthers: capsules thick, subclavate, torulose, erect or refracted: seeds few, 

 low-papillate. In the western part of our range to the Pacific States. 



3. Gayophytum ramosissimum T. & G. 1. c. Glabrous, or the inflorescence 

 puberulent, diffusely much branched: flowers 1-2 mm. long, mostly near the 

 ends of the branches: capsule oblong, 5-8 mm. long, on pedicels of about the 

 same length or shorter, often deflexed, 3-5-seeded: stamens in two sets; the 

 anthers of the shorter set often abortive. (G. intermedium Rydb. Bull. Torr. 

 Bot. Club 31: 569. 1904.) Throughout the western United States. 



2. CHAMAENERION Adans. FIREWEED 



Perennials from a stout caudex, bearing sessile, scaly, winter buds with 

 terete stems and ample leaves. Calyx cleft almost to the ovary. Corolla 

 slightly irregular; petals widely expanded, ^bamens inserted in a single 

 series; the filaments dilated below. Style at first recurved; stigma with four 

 ultimately divergent lobes. Capsule mostly linear-fusiform, many-seeded. 

 Seeds fusiform, beakless, comose. 



Stems tall; bracts small; style pubescent at base . . . 1. C. angustifolium. 



Stems low (2-5 dm.); bracts leaf-like; style glabrous . . . .2. C. latifolium. 



1. Chamaenerion angustifolium (L.) Scop. Fl. Cam. Ed. 2. 1: 271. 1772. 

 Stems erect, 5-15 dm. high, subsimple, glabrate below: leaves lanceolate, 

 acute, nearly entire, 1-2 mm. long, on very short petioles, thin, pinnately 

 veined, with the evident lateral veins confluent in submarginal loops: in- 

 florescence elongated; racemes with small bracts; young flower buds soon re- 

 flexed, but again spreading or ascending before expansion: petals 9-15 mm. 

 long: style exceeding the stamens, hairy at base: capsule 5-7 cm. long: seeds 

 less than 2 mm. long, with very long dingy coma. Epilobium spicatum. 

 Frequent in our mountains; across the continent northward and in Europe 

 and Asia. 



2. Chamaenerion latifolium L. Sweet, Hort. Brit. Ed. 2. 198. 1830. Stems 

 2-4 dm. high, frequently branched, mostly glabrate below: leaves 3-5 cm. 

 long, usually opposite and connected below on the branches and rarely on 

 the main stem, lanceolate to ovate, acute at both ends, entire or sparingly 

 and minutely denticulate, scarcely petioled, rather coriaceous, the mostly 

 free lateral veins inconspicuous: inflorescence usually short and few-flowered, 

 leafy throughout, the buds not reflexed: petals 1-2 cm. long, rather narrow: 

 styles shorter than the stamens, glabrous. Epilobium latifolium. Northern 

 America and extending south to Colorado in the mountains. 



3. ZAUSCHNERIA Presl. 



Perennial herbs or somewhat suffrutescent. Leaves opposite, except those 

 of the floral branches. Flowers racemose, large, scarlet. Calyx-tube globose, 

 inflated just above the ovary, then becoming funnelform, 4-lobed, bearing 

 8 small scales within at the upper end of the short proper tube, 4 erect and 4 

 reflexed. Petals 4, little exceeding the calyx-lobes, obcordate or deeply cleft. 

 Stamens 8, the 4 alternate with the petals inserted lower down and appearing 

 shorter; anthers linear-oblong. Style long, exserted; stigma peltate or capi- 

 tate, 4-lobed. Capsule slender-fusiform, obtusely 4-angled, 4-valved, many- 

 seeded. 



1. Zauschneria Garrettii A. Nels. Proc. Biol. Soc. Wash. 20: 36. 1907. 

 Caudex woody; stems simple, slender, suberect, 1.5-3 dm. high, hirsute, the 

 hairs long and widely spreading: leaves oval or ovate, 2-3 cm. long, with 

 small, rather remote and irregular teeth, green but sparsely soft-hirsute: 

 calyx puberulent, its tube deep red, 12-16 mm. long: petals thick, deep red, 

 obovate-cordate, slightly exceeding the calyx-lobes: stigma tardily well ex- 



