148 



Tlu'sr tAvo lonns an^ distinct iVoiii //. microphifUa by fjrowiiifij (somewliat) in 

 cliiiu}ia uud beiug more or leas intricately liraiiclicd (even from lic.low), in the rigi<lity 

 of the stems, iu beinj;- entirely glabrons, in the iniintcd Uoweriii^- bnds, antl the 

 strongly attonnate ikmI, 



\S2. With both stipitatf and black senile (jlauds: flowers mhcrcct, with ovitte tracts and 

 deridiioiiH svpals: stuinois Homewhat declined: pod hroadUj ascinaeiform: x ii{l'r tiles - 

 cent. 



11. H.caiidatar.ruy, PL Lin<lh.])t.ii. 170(1850). .StemH30to45 cm. liiffli, with small 

 ta.cli-Hiiai)e(! ^ilandM: iMiiinc ;5 to !», 2 to t cm, lonj;-, with T) to 7 i»airs of leallcts, the 

 terminal one I wice as lony and with 11 to 15 ]>airw; leaflets ovate snbcordate, veined, 

 sometimes minutcdy blu(d< pnnetate beneatli : raceme sparsely 6 to 9-flower^^d : sepals 

 oval, e()n('ave, witli both stiititate and black sessile glands: petals sessile, idiijttical, 

 ■with sessile glands: filaments cfj^landnlar with blnnt itnbescence, the njiper not 

 dilated: style cylintlrieal : [>od with njiper suture nearly sf riii<;h1, with dark siibsessile 

 jflands: seeds large. 



Habitat: From southern New Mexico (on Rio Grande) tlirongh southwestern 

 Texas. 



Specimens examined : Texas ( HntjhtUC}, type; Schott, 1851) ; New Mexico (Mexican 

 lionudary Hurvey, 279). 



Ty]i<^ in Herb. (I ray. 



ThiK si>e<ies is related to Cwsalpinn in respect to sepals, petals, and ]iod. 



^ 3. I'artk with hiaek sessile or siibsessile ijhtnds: leaflets black punctate beneath; stipules 

 setaieoHs {except Xo, 12): bracts ovate-afleiiuate: califjr oblitfue, irilh the loiver neipiieiit 

 much broader, eariiiafe-conearc, at last deciduous: petals iflandless below, the rexUhnii 

 smallest: fliamcnts irilh dense aud slender pubescence: style xhort, enlartjed above; 

 stifiiua hinted to the n)>per side, someirhnt hooded: pod with muricate-setose projections 

 and black depressed hcssile or subscffnile i/land'^, acute, 2 or ^-seeded. 



* Flowers with black flask-shaped subsessile tjluiids: pod orate or rhombic. 



12. H. brachycarpa flray, PI. Wright, i. 55 (1852). Herbaceous, 18 to30cm. high, 

 -with several slender stems from a ligneous root, few 8essil(> gliuids, leafy t<) the top: 

 leaves short; pinna>. 5to7; leaflets 4 or 5 pairs, elli]ttieal, largt^-jmnetate; stipules 

 obovate, caducous: i^eduncle short, with few small flowers on non-jointed pedicels: 

 sepals and petals with black llask-shape<l subsessile glands: ]>od oval, cuspidate, with 

 few glan<ls, (Ik^ nuvrgin bes(d, with large; ]iroiections : 2 broadly obovate see<ls. 



Habitat: From New Mexico through southwestern Texas. 



Speeinu^ns examinc^d: New Mexico ( /I'nV/A/ 1023, tyju', in part, 77, type, 179 type); 

 Texas {h'ereri'hon 3tJ, 1510); Texas and New Mexico ( U'riijht, 1851, tyjie). 

 Type, in Herb. (hay. 

 The ova! pad distinguishes this s|KH'ics from all others. 



13. H.mnltijuga\Vats(.n I'roc.Am. Ac.id. x\i. 151 (1880). Herbaceous, stout, fiO to 

 90 cm. high, covered throughout (ex. 'cjit leaflets) with llask-shaped subsessilegl'ands: 

 leaves large; pinna' 13 to 21; leaMets 5 to9 pairs, tii)]>ed with a tiask-.shapeirgland : 

 racemes opjxisite tlie leaves (longer), mau.\ -flowered: ]iediccls Joint(Ml in the mid- 

 dle: vexillum small, with lamina denscdy covered with Idack, slender, obelavate 

 glands: pod oblong-rhombic, 3 Ity 1 cm., cuspidate, 2-seedcd. 



Habitat: Ivo<ky hills near (liihua.hua, ('hihuahu:i. 

 Speeiitu'us <^xamin»Ml : Chihuahua (Prini/le 118 and 371, typos). 

 Tyj.es in Herb. Gray, .1. Donuell-Smith, Canby, Martindale and Missouri liotau- 

 ical (Jarden. 



* * Flotcers with pyriform ijlandx, intermixed (on cali/x) with few black sessile one«. 



