34 NORTH AMERICAN FLORA [Volume 24 



Amorpha humilis Tausch, Flora 21: 750. 1838. ? Amorpha nonperjorata Schkuhr, 

 Handb. 2: 333. 1796. A morpha fruticosa Hayne, Dendr. Fl. 134. 1822. Amorpha jruticosa 

 humilis C. K. Schneid. Handb. Laubh. 2: 73. 1907. This is admitted as a variety of A. fruti- 

 cosa by C. K. Schneider, but no native form agrees with the descriptions. 



12. EYSENHARDTIA* H.B.K. Nov. Gen. & Sp. 6: 489. 1824. 



Viborquiaf Ortega, Dec. 66. 1798. Not Viborgia Moench, 1794. 

 Varennea DC. Prodr. 2: 522. 1825. 

 Wiborgia Kuntze. Rev. Gen. 213. 1891. 



Much branched shrubs or trees. Leaves alternate, pinnate, with oblong to elliptic- 

 oval, glandular-punctate leaflets. Flowers in loosely clustered terminal spike-like racemes. 

 Calyx unequally lobed, the anterior lobe longest, the tube split more deeply between the pos- 

 terior lobes. Corolla nearly regular; petals inserted on the hypanthium, mostly nearly equal, 

 with oblanceolate to obovate blades and narrowed claw-like bases, white or rose-tinged, the 

 standard slightly or decidedly larger, truncate to notched. Stamens 10, diadelphous; fila- 

 ments glabrous, nine united for about half their length. Ovary sessile; style slender, more or 

 less pubescent, upcurved and bearing a conspicuous gland near the apex, or straight and gland- 

 less; stigma large, capitate. Ovules 2-4. Pod indehiscent; seed solitary, pendulous, the 

 hilum near the distal end. 



Type species, Eysenhardtia amorphoides H.B.K. 



Calyx slightly irregular, in fruit tubular-campanulate; slit between posterior 

 lobes shallow; anterior lobes not much longer than the posterior. 

 Racemes elongate; style slightly pubescent, more or less upcurved at the apex, 

 bearing at the curve a gland; pods 7-19 mm. long; seed not filling the 

 entire pod; leaves 3-15 cm. long; leaflets 21-51,3-24 mm. long, not 

 thickened. 

 Pods reflexed-spreading, punctate with inconspicuous glands; standard 

 decidedly notched. 

 Petals more than twice as long as the calyx, membranous; leaves mem- 

 branous. 

 Leaflets minutely pubescent on both surfaces, obscurely reticulate 

 above. 

 Calyx-lobes acute, 0.4—0.8 mm. long; leaflets 10-20 mm. long; 

 stipels reddish, much shorter than the petiolules, soon de- 

 ciduous. 1. E. orthocarpa. 

 Calyx-lobes obtuse to acutish, 0.2-0.5 mm. long; leaflets 3-10 

 mm. long; stipels brownish, frequently equaling the petio- 

 lules. more or less persistent. 2. E. polystachya. 

 Leaflets glabrate or glabrous on both surfaces, decidedly reticulate 



above. 3. E. reticulata. 



Petals not more than twice as long as the calyx, firm; leaves firm. 

 Leaflets decidedly reticulate above ; calyx with tube strongly ridged ; 



gland on style small. 4. E. subcoriacea. 



Leaflets obscurely reticulate above; calyx with tube slightly ridged; 



gland on style large. 5. E. cobriformis. 



Pods ascending-spreading, punctate with evident glands; standard 

 emarginate to slightly notched. 

 Pods 12-19 mm. long, 3.5-4 mm. wide, straight or nearly so; seeds 

 thin, filling less than half the length of the pod; calyx-lobes less 

 than 0.3 mm. long; leaflets punctate beneath with reddish to 

 brownish dots. 

 Leaflets 12-15 mm. long, pale beneath; pods 12-13 mm. long, 



3.5-4 mm. wide, greenish-brown. 6. E. platycarpa. 



Leaflets 15-24 mm. long, glaucous beneath; pods 17-19 mm. 



long, 3.5 mm. wide, pale-brown. 7. E. adenostylis. 



Pods 7-10 mm. long. 1.7-2.5 mm. wide, more or less upcurved; seeds 

 thickened, filling more than half the length of the pod; calyx- 

 lobes 0.6-0.9 mm. long; leaflets punctate beneath with nearly 

 black dots. 

 Leaves 8-9 cm. long; leaflets 37 — 47, narrowly oblong, 10-12 mm. 

 long; gland on style large, pale-yellowish; pods slightly up- 

 curved at least near apex. 8. E. angusiifolia. 

 Leaves 3-6 cm. long; leaflets 15-31, oblong, 5-11 mm. long; 

 gland on style short and thick, reddish-brown; pods strongly 

 upcurved throughout. 9. E. texana. 



* Contributed by Francis Whittier Pbnnell. 



t Named in honor of " D. Viborq" of Copenhagen, an evident misspelling of Viborg. 



