12 NORTH AMERICAN FLORA [Volume 24 



mm. long, with a rounded basal lobe, those of the keel-petals 10 mm. long, obliquely _lunate 

 obtuse. L claws of both 4 mm. long; tenth filament free to near the base, pod about 

 8 mm. long, hirsute, with a veryismall straight beak; seed elliptic, light-brown. 



Type locality: California. 



S=! Bof Ret 23: * 1971; Lounsberry, Guide Wild Fl. * 61. 



6. RHYTIDOMENE* Rydberg, gen. nov. 

 Perennials with creeping rootstocks. Leaves alternate, scattered, digitally 5-7-folio- 

 late w h landular-dotted linear-filiform leaflets. Flowers in long-peduncled axillary lax 

 racem" Calyx campanulate. with a short tube, not gibbous at the base, 5-lobed the lows 

 obe the longest. Corolla blue, not strongly veined; banner with a conduphcate orbicular 

 btde and a Lrt doubly bent Caw; blades of the wings narrowly °«^°^££S 

 at the apex, with a small basal lobe and twice as long as the free claws; blades of the keeL petals 

 simUar but one third shorter, barely lobed at the base, united at the rounded apex, each adnate 

 o tie accent wing at the base. Staminal tube as in Orbexilum. Style merely curved up- 

 wa^s Pod crescent-shaped, somewhat twisted, exserted from the calyx, with a short beak, 

 pericarp coriaceous, obliquely cross-wrinkled. 

 Type species, Psoralea Lupinellus Michx. 



1. Rhytidomene Lupinellus (Michx.) Rydberg. 



Psoralea Lupinellus Michx. Fl. Bor Am. 2: 58. 1803. 



?£& JKSS Sh C utK-Or|°P,|4ht 9l : 45; hyponym. 1852. 



Lolodes Lupinellus Kuntze, Rev. Gen. 194. 1891. 



A perennial with a creeping rootstock ; stem erect or adsurgent, 3-6 dm. high branching 

 glabrous sSy glandular dotted; leaves digitately 5-7-foliolate; stipules 2- mm long 

 petLles 2- cm. long; leaflets 5-8 cm. long, linear to filiform, with a few scattered gland, 

 peduncle; 5-7 cm. long; racemes lax, 2-5 cm. long, few-flowered; bracts mmute ova e, cusp.- 

 date caTyx sparingly "s'trigose, enlarging in fruit; tube 1.5 mm >ong sparmgly ^ndifla - 

 ounctate beneath- two uppermost lobes broadly ovate, acute, 1 mm. long, the lateral ones 

 Zte lanceoS, slightly longer, the lowest one subulate, fully 2 mm. long; corolla blue; pod 

 1 cm. long, glandular; seed kidney-shaped, brown. 



Type locality: Arid places of Carolina 

 Distribution: North Carolina to Florida. 



7. PSORALIDIUMf Rydberg, gen. nov. 



Perennial herbs, with rootstocks. Leaves alternate, glandular-dotted digitately 3-5- 

 foliolate Flowers in long-peduncled interrupted spikes or racemes, bearing 1-4 flowers at 

 ah node cX* ampanulate, with a short tube, 5-lobed, the lowest lobe usually somewhat 

 each node Cay P sometimes whitish, with purple-tipped keel, 



oblanceolate, oblong, or obovate, rounded at the apex, each with a smal basaUob e thos^o 

 the wings twice as long as their claws and as long as the blades of the ^^ S *£ 

 tube as in Orbexilum. Tenth stamen usually free to near the base. Style ^above st g 

 capitate Pod from orbicular to oblong-ovate, somewhat compressed gl^dular dotted but 

 not winkled, with a short straight beak; pericarp coriaceous, not attached to the seed. 

 Type species, Psoralea tenuiflora Pursh. 



R atmeI-short L densrr-3 A cm. long; calyx-lobes obtuse or rounded at the 

 apex. 

 ~T^7.^rinkle, and „*. crescent, referring to the shape of the wrinkled pod. 

 t Diminutive of Psoralea. 



