ADDITIONS AND CORRECTIONS 1141 



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1014 After 0. A cant i um insert: 



2. Onopordon tauricum Willd. Biennial; stem 3-5 dm. high, 

 wing-amgled, glandular-pubescent; leaves arachnoid when young, glabrate 

 in age, lanceolate, sinuate-dentate, strongly spinescent, the cauline ones 

 decurrent; heads 3-5 cm. broad; bracts glandular-pubescent, lanceolate, 

 the lower spreading; flowers purple. Waste places: Pueblo Co., Colo.; 

 escaped from cultivation. 



1015 After C. solstitialis insert: 



3. Centaurea Picris Pall. Stem 3-5 dm. high, finely puberulent, 

 striate; lower leaves pinnately lobed, 1 cm. long, the upper entire, glabrate 

 in age, linear or lance-linear, those of the branches 1-2 cm. long; involucre 

 1-1.5 cm. broad and about as high; bracts broadly obovate, with a mem- 

 branous-scarious tip, the outer rounded, the inner acute; corolla purplish. 

 Waste places: Mo. Ida. Utah; adventive from South Russia and the 

 Orient. Je-Au. 



1019 For Adopogon Neck, and ^4. virginicus (L.) Kuntze read Cynthia 

 D. Don and C. virginica (L.) D. Don., the genus Adcpogon being European. 



1020 Under Nothccalais cuspidata insert as synonym Agoseris cuspidata 

 (Pursh) D. Dietr. 



1023 In description of Pleiacanthus, 3d line, for linear, read lanceolate. 



1028 Under H. albertinum add the synonym //. absonum Macbr. & Pays. 



1031 The authority of A. glauca should be (Pursh) D. Dietr., and that of A. 

 parviflora (Nutt.) D. Dietr. 



1032 After A. montana insert: 



17a. Agoseris frondifera Osterhout. Leaves narrowly oblanceolate, 

 1-2 dm. long, glabrous, entire or with short lobes; scape about 2 dm. high; 

 outer 1-4 bracts leafy, one often leaf-like, 4-6 cm. long, the rest of the 

 bracts about 2 cm. long, in 3 series, the outer broad, abruptly acuminate, 

 tomentose on the margins, the inner narrow and scarious-margined; 

 ligules yellow; achenes striate, the body 8 mm. long, the beak 6 mm. long; 

 pappus white, 1 cm. long. Mountains: Colo. Mont. An. 



1028 For 2. H. scabriusculus read 2. H. scabriuscv.lum. 



1034 In the description of Leontodon, 1st line, transpose the words so as to 

 read ''with fleshy tap-roots, pinnatifid, toothed or rarely entire leaves." 



1040 Before Polypodiaceae insert: 



2. OPHIOGLOSSUM (Tourn.) L. ADDER'S TONGUE. 



Terrestrial plants with root-stocks. Common stalk with the bud placed 

 at its side and bearing a sterile and a fertile frond. Sterile frond fleshy, 

 simple, the veins reticulate. Sporophyll with the sporangia connate and 

 coherent in two ranks on its two edges. 



1. O. vulgatum L. Frond 5-40 cm. high; sterile frond sessile near 

 the middle of the plant, ovate or elliptic oblong, 5-9 cm. long, rounded or 

 obtuse at the apex. Meadows or slopes: N. S. Fla. Mont. Alaska. 

 Je-Au. 



1048 In the 8th line for aquilina read aquilinum. 



1052 For 7. E. robustum A. Br. substitute 7. Equisetum praealtum Raf., 

 an older name. 



1056 After S. Watsoni insert: 



4a. Selaginella Standleyi Maxon. Stems prostrate, 6 cm. long or 

 less, densely short-branched; leaves dull bronze-green, oblong-linear, 

 2-2.5 mm. long, with 10-14 cilia on each side; apical bristle stout, yellowish 

 throughout; fertile spikes 7-11 mm. long. Moist rocks: Alt a. Mont. 

 Alp. 



In the index there are a few typographical errors and a few names out 

 of the alphabetical order. These errors are here omitted as they are easily 

 understood. 



