220 PROCEEDINGS OF THE AMERICAN ACADEMY 



74. A. MICROCYSTIS, sp. nov. Cinereo-pubescens, e radice lig- 

 nescente procumbens ; caulibus gracilibus ramosissimis ; stipulis scari- 

 osis connatis summisve fere liberis ; foliolis 4— 6-jugis oblongis seu ob- 

 longo-lanceolatis obtusis ; racemis 5-12-floris gracilibus ; calycis pilosi 

 dentibus setaceo-subulatis tubo brevi-campanulato aequilongis ; corolla 

 violacea seu albo-violaceo, vexillo profunda eraarginato alas pauUo 

 carinam incurvam bis superante ; legumine inflato globoso-ovato tenui- 

 membranaceo griseo-pubescente lin. 3 longo. — Interior of Washington 

 Territory, Fort Colville to the Rocky Mountains, Dr. Lyall (ex herb. 

 Kevv. no. 4, 5, 6). — This has the aspect of A. sparsifiorus ; and the 

 flowers are similar ; but the fruit is quite different, neither suture being 

 at all introflexed, and resembling the Liflati on a very small scale. 



75. A. LEPTALEUS. A. ( Phcica) paucijlorus, Gray, Enum. coll. 

 Parry, Hall, & Harbour, 1. c. no. 141, non Hook. Phaca paucijlora, 

 Nutt. in Torr. & Gray, Fl. 1, p. 348, fide herb. Durand. Fere glaber; 

 caulibus tenellis adscendentibus (spithamajis) ; stipulis basi subconnatis 

 elongato-subulatis ; foliolis 7 - 11-jugis lanceolato-linearibus oblongisve 

 saepe acutis ; pedunculis folio brevioribus 2 - 4-floris ; calycis nigro- 

 pilosuli dentibus subulatis tubo campanulato parum brevioribus ; corolla 

 alba, vexillo eraarginato carina apice violacea tertia parte longiore ; 

 legumine ovato seu ovali puberulo chartaceo (lin. 4 longo) sub-obcom- 

 presso ? — Valleys of the Rocky Mountains, in South Park, &c. — 

 Flowers about 4 lines long, on pedicels about the length of the calyx- 

 tube and of the subulate bract. Herbage tender : said to be a good 

 forage plant where abundant ; but it is small and slender. NuttaP 

 states that he has seen but a single specimen, and that not in flower. 

 There is only one specimen named by him in the Philadelphia collec- 

 tions, viz. in Mr. Durand's herbarium, and that is in flower only. 



76. A. Thurberi, Gray, PI. Thurb. p. 312, & Bot. Mex. Bound, 

 p. 50. Pube minuta cinereus ; caulibus suberectis (6 - 10-pollicaribus) ; 

 stipulis discretis scariosis parvis ; foliolis 6 - 7-jugis lineari-oblongis 

 retusis crassiusculis ; racemis spicisve laxe 10 - 20-floris in pedunculo 

 brevi ; dentibus calycis subulatis tubo parum brevioribus ; corolla al- 

 bida ; legumine coriaceo-merabranaceo globoso glabello (lin. 3 diame- 

 tro). — Arizona, on dry plains. — Flowers barely 3 lines long, on very 

 short pedicels. 



§ 22. Bisulcati. Legumen coriaceum, e calyce per stipitem brevem 

 exsertum, leviter obcompressum, antice concavum, recessu sutura 

 cariniformi maxime pi-ominente percurso. — Glabelli vel glabri ; 



