or ARTS AND SCIENCES : NOVEMBER 11, 1863. 225 



§ 25. Podo-sclerocarpi. Legumen crasso-cartilagineum, exserte stipi- 

 tatum, compressum, incurvum, suturis valide incrassatis nequaquam 

 intrusis a valvis demura secedentibus marginatum. — Perennes, 

 ramosi, cinereo-puberuli, arenicolifi, stipulis parvis discretis. 



89. A. SCLEROCARPUS. Phaca podocarpa, Hook. Fl. Bor.-Am. 1, 

 p. 142. Ramosissimus, fere canescens ; foliolis 6-9-jugis linearibus ; 

 racemis laxis ; floribus albis ; legumine canescenti-puberulo lunate 

 nunc fere hamato acumine cuspidate basi in stipitem validum caljce 

 bis terve longiorem attenuate, valvis rigidissimis turgidis rugulosis. — 

 Dry, sandy barrens at the Great Falls of Columbia River, Douglas, 

 and lately collected by Dr. Lyall, with ripe fruit. This when well 

 formed is an inch long, and with the stipe not much shorter ; the 

 very thick valves become strongly convex. There is an A. podocar- 

 pus of long standing. 



90. A. SPEiROCARPUS, sp. nov. Subcinereus, semipedalis ; foliolis 

 4 — 9-jugis oblengis retusis ; racemis paucifloris ; legumine glabrate 

 Hneari-lanceolato complanato spiraliter 1 - 2-cycle, stipite calycem bis 

 superante. — Wenass, in the valley of the Upper Columbia River, Dr. 

 Lyall, ex herb. Kew. In fruit only : the legume coiled like that of a 

 Medicago. — The sutures, at least the thick ventral one, may be seen 

 to separate more or less from the mature fruit in A. gracilis, microlohus, 

 and I believe in A. pectinatus. In this and the preceding, both sutures 

 become at length mere or less detached, as in certain MimosecB. 



§ 26. Homcdobi. Legumen Vicioe- seu Ervi-forme cemplanatum vel 

 pi. m. compressum, rectum, suturis nerviformibus nequaquam in- 

 trusis marginatum, coriaceum vel chartaceum, quandoque stipita- 

 tum. — Perennes, alii pinnatifolii foliolis pluribus paucisve, alii 

 simplicifolii, habitu diversi. {Homcdobus et Kentrophyta, Nutt.) 



* Genuini ; floribus in racemis spicisve pedunculatis ; leguminibus 



pluri-(7 - 20-)ovulatis. 



■\- Stipuke ut videtur omnes discretre. Legumen exserte longeque 

 stipitatum. Calycis dentes tube 3 - 4-plo breviores. Caulescentes, 

 plerumque ultrapedales, pinnatifolii, plurifoliolati. 



91. A. COLLINUS, Dougl. in Hook. Fl. Bor.-Am. 1, p. 141. Phaca 

 collina, Hook. 1. c. Subcineree-pubescens pube laxa, erectus vel 

 diffusus ; foliis linearibus seu oblengo-linearibus obtusis basi attenu- 

 atis ; pedunculis folio duple lengieribus ; raceme brevi oblongo confer- 

 tifloro ; floribus in pedicello suberecto retrofractis ; calyce oblongo- 



