Rydberg: Notes on Fabaceae — II 263 



22. Homalobus junceus Nutt. The duplicate of the type 

 in the Torrey Herbarium is in fruit but shows a white-hairy 

 calyx with very short calyx-lobes and leaves with no or very 

 small lateral leaflets. Sheldon thought that this and Astragalus 

 diversifolius represented but one species and applied the latter 

 name to it, as the earlier A. junceus was preoccupied by A. 

 junceus Ledeb. Since, however, A. diversifolius is a synonym 

 of H. orthocarpus, A. junceus, if transferred to Astragalus, would 

 be without a name. This species is much more common than 

 H. campestris. I shall therefore not enumerate any specimens. 

 Most of those cited by Macbride under A . campestris belong here. 

 Jones, as already noted, named the species A. diversifolius 

 roborum. 



23. Homalobus junciformis (A. Nels.) Rydb. The status 

 of this species is somewhat problematical, since it has the short 

 calyx-lobes of H. junceus and the black-hairiness of H. cam- 

 pestris. It is stouter than either, with larger flowers and 

 broader leaflets. Standley regarded it as identical with H. 

 orthocarpus, but that species has smaller flowers and a much 

 broader pod. The mature pod of H. junciformis is unknown, 

 but the young pod suggests a similarity to that of H. junceus. 

 Jones* made H. junciformis a synonym of A. diversifolius, 

 evidently not being acquainted with the true A. diversifolius. 

 The only specimens of H. junciformis seen are: — 



Wyoming: Fort Steele, A. Nelson 483Q; Point of Rocks, A. 

 Nelson 3081; Leucite Hills, A. Nelson 4668. 



24. Homalobus orthocarpus Nutt. The duplicate of the 

 type in the Torrey Herbarium shows only the upper part of the 

 plant, but Nuttall states that the lower leaves bear several 

 leaflets, while the upper are more or less reduced to the rachis. 

 This fact furnished Gray the name Astragalus diversifolius, 

 when he found that A. orthocarpus was preoccupied by A. ortho- 

 carpus Boiss. In H. orthocarpus the calyx is white-hairy, the 

 lobes are deltoid and not much longer than broad, while the 

 pod is much broader than in the related species, in the duplicate 

 of the type being about 2 cm. long and 4 mm. wide. In the 

 herbarium of the New York Botanical Garden the only specimen 

 like the type is Goodding 1084 from Juab, Utah, which has been 



* Contr. West. Bot. 10: 68. 1902. 



