IIS Proceedings of the Biological Society of Washington. 



Amsonia hirtella Standley sp. nov. 



Perennial from a somewhat woody root; stems stout, erect, 50cm. high, 

 with rath'erfew erect or ascending branches above the middle, abundantly 

 hirtellous; leaves narrowly lance-linear, 30 to 45 mm. long, 2 to 5 mm. wide, 

 acute, attenuate to a petiole-like base, abundantly hirtellous, especially on 

 the margins and veins; flowers numerous, in dense terminal or lateral 

 clusters, usually exceeding the leaves; pedicels short, 2 mm. long or less, 

 densely hirtellous; calyx 5 to G mm. long, glabrous or nearly so except 

 for the long linear hirsute tips of the linear-lanceolate lobes; corolla tube 

 about 14 mm. long, dilated upward, constricted at the mouth, villous 

 within; corolla lobes oblong or oblong-oval, 5 to G mm. long, obtuse. 



Type in the U. S. National Herbarium Xo. 691,857, collected in canyons 

 near the Upper Corner Monument, southern Grant County, New Mexico, 

 May 1, isirj, by Dr. E. A. Mearns ( Xo. 117). 



This plant seems to be most closely related to Amsonia longiflora Torr. 

 That species is glabrous throughout and has flowers nearly three times as 

 large. 



The writer would referjiere provisionally the following specimens: 



Chihuahua: Candelaria. 1911, Stearns 228. 



Texas: Bofecillos, May 18, 1881, Haeard. 



Without definite locality: Mexican Botmdary Survey 1053., in part. 



These last three specimens all have young or mature fruit and no 

 flowers. The fruit is slenderly cylindric, continuous, with no constric- 

 tions between the seeds, glabrous, (S cm. long or less. The pubescence of 

 the leaves and stems is similar to that found in the type of J . hirtella, but 

 it is more abundant and is scattered all over both surfaces of the leaves. 

 The calyx, too, is densely hirtellous throughout. When the corollas of 

 this form are seen, it may be found that the plant from farther east and 

 south is really a different species. 



Chrysothamnus elatior Standley sp. nov. 



Slender shrub 1 meter high or less; older branches whitish, striate, 

 puberulous or glabrate, erect; leaves numerous, erect or ascending, linear, 

 20 to 25 mm. long, 2 nun. wide or less, acutish, sharp-pointed, narrowed 

 at the base, the uppermost narrower, shorter, and with more or less 

 involute margins, all thick, rigid, finely and densely puberulous with 

 white hairs; inflorescence rather densely corymbose, composed of few to 

 many heads; peduncles ascending, 5 to 13 mm. long, puberulous, fur- 

 nished with short bract-like leaves; involucres narrow, t( to 12 mm. high, 

 5-angled by the pentastichous bracts; these in 5 or G series, the outer 

 successively shorter, the outermost oblong-lanceolate and acute, the inner 

 linear-oblong, abruptly acuminate to a slender tip, all somewhat coriace- 

 ous, pale, with short green tips; flowers usually 5; corolla slender, 12 mm. 

 long, glabrous; achenes glabrous, li or 7 mm. long, 5-angled, with a 

 prominent nerve on each face; pappus yellowish white, rigid, about 14 

 mm. long. 



