ADDITIONS AND CORRECTIONS 



5?i After N. inlftim insert: 



7a. Nuttallia marginata Osterhout. Biennial; stem 3 dm. high 

 or more, white, rough-pubescent above; lower leaves oblanceolate, dentate, 

 6-8 long, 5-7 mm. wide, rough-pubescent; flowers subtended by a single 

 entire bract; petals 10, ovate-spatulate, 13 mm. long, pubescent without, 

 yellow; capsule 8-11 mm. long; seeds fully 2 mm. long, 1.5 mm. wide, 

 with a narrow margin. Arid places: w Col. Submont. Au. 



57 '2 For A T . Rusbyi (Woot.) Rydb. read Nuttallia hastata Osterhout. 

 Add to the description and modify it in the following respect: leaves 

 more decidedly coarsely dentate than in N. Rusbyi, the upper sub-hastate 

 and sessile; petals w r hite; capsule angled. Distribution: Colo. s Wyo. 



57J I'lidor A', stricta, 3d line, instead of "2.5-3.5 mm." read "2.5-3.5 cm." 

 573 The authority for A, gracilis should be (Nutt.) Rydb. 



573 After A. lenerrima insert: 



6a. Acrolasia humilis Osterhout. Stem 1-1.5 dm. high, more or 

 less pubescent at least above; lower leaves spatulate, 3-5 cm. long, short- 

 petioled, the upper sessile, ovate, 2 cm long, entire; flowers sessile, axillary; 

 sepals linear, 2 mm. long; petals yellow, broadly obovate, 2.5-3 mm. long; 

 capsule becoming about 1 cm. long, 3 mm. wide; seeds prismatic, muricate. 

 In habit resembling A. compacta, but the seeds are like those of A. albi- 

 caulis. Arid soil: w. Colo. Son. My. 



574 After M. oligosperma insert: 



2. Menzelia Torreyi A. Gray. Perennial, much branched, 1-2 dm. 

 high; leaves 2-3 cm. long, sessile, pinnatifid, with 1-3 linear lobes on each 

 side, strongly revolute-margined ; flowers solitary in the axils; hypanthium 

 about 5 mm. long, in fruit urceolate-ovoid; calyx lobes 5-6 mm. long; 

 petals 5, about 1 cm. long; seeds few, oblong, acute at the base, smooth 

 and shining. Desert regions: Nev. s Ida. Jl-Au. 



576 After O. polyacantha insert: 



8a. Opuntia angustata Engelm. Stem erect; internodes narrow, 

 15-25 cm. long, oblanceolate, rounded above, narrowed downward; 

 pulvinae distant, large, oblong; spines sharply angled, straw-colored 

 or whitish, with brown bases, 2.5-3.5 cm. long; bristles brown; fruit 

 obovoid, 2.5-3 cm. long. Deserts: N. M. Utah Calif. Son. 



8b. Opuntia hystricina Englem. & Bigel. Stem diffuse, internodes 

 obovate to orbicular, 8-20 cm. long; pulvinae numerous; spines numerous, 

 pale-brown or white, the longer 5-10 cm. long, stout, flattened, often 

 reflexed; bristles yellow; petals broad, yellow; fruit oblong or obovoid, 

 2.5-3 cm. long, spiny above, dry. Deserts: N. M. Utah Nev. Ariz. 

 Son. 



583 & 



592 For Boisduvallia read Boisduvalia. 



586 In the key, for 27. E. Lindleyi, read 27. E. minutum. 



590 After E. lutcum insert: 



35. Epilobium obcordatum A. Gray. Stem branching at the base, 

 decumbent, 0.5-1.5 dm. long, 1-5-flowered, glabrous; leaves opposite, 

 ovate, sessile, 8-20 mm. long, glaucous; petals obcordate, v ose-colored, 

 spreading, 10-14 mm. long; style declined; stigma 4-loberl: capsule short 

 and thick. Mountains: Ore. Ida. Nev. Calif. Su' dp. 



594 Before 4. 0. Coclerellii insert: 



3a. O. biennis L. Biennial; stem stout, 3-15 dm. high -ample, pilose 

 or hirsute; leaves lanceolate or oblanceolate, 1-3 dm. long, e'>and-dentate, 

 acute or acuminate, puVse on both sides; bracts lance< late about equal- 

 ing the capsules; free tube of the hvpanthium about 3 cm l'>ng; calyx- 

 lubes about 2 cm. long, the free tips about 3 mm. long: ptals yellow, 



