330 LEGUMINOSAE 



green, apparently glabrous but scantily and minutely puberuient; leaves remote, 

 Y2 to 3 lines long ; leaflets 3, elliptic, V2 to 2 lines long ; peduncles 1/2 to % line long, 

 shorter than the leaves; umbels subsessile, 1 or 2-flo\vered; flowers 2 lines long; 

 calyx-teeth linear-lanceolate, i/^ as long as tube; corolla yellow; pods incurved, 

 1-seeded. 



Kocky slopes, 2500 feet : mountains on west side of Colorado Desert, boundary 

 of San Diego and Imperial counties. 



Lotus baydonii is an extremely rare species. Apparently it has been collected only at 

 Mountain Springs on the east slope of the mountains east of Carrizo Gorge. It has a distinctive 

 habit and needs study in the field. 



Refs. — Lotus hatdonh Greene, Pitt. 2:149 (1890); Jepson, Man. 555 (1925). HosacTcia 

 haydonii Orcutt, West. Am. Sci. 6:63 (1889), type loc. canon leading into Colorado Desert, on 

 San Diego to Fort Yuma stage line, Orcutt. Syrmatium haydonii Hel. Muhl. 9:67 (1913). L. 

 spencerae Mcbr. Contrib. Gray Herb. 53:13 (1918), type loc. Mountain Sprs., Colorado Desert, 

 M. F. Spencer. 



18. AMORPHAL. 



Deciduous shrubs with heavy-scented herbage. Leaves odd-pinnate, with 

 caducous stipules and stipels, the leaflets dotted with translucent glands. Flowers 

 small, violet or purple, in long and narrow terminal spikes. Calyx obconic, 5- 

 toothed, persistent. Petals wanting except the banner, this erect, clawed, folded 

 around the stamens and style. Stamens monadelphous at the very base, otherwise 

 distinct, longer than the banner. Pod short, but exceeding the calyx, 1 or 2-seeded, 

 tardily dehiscent. — Species 10 to 15, North America. (Greek amorphos, deformed, 

 alluding to the corolla.) 



Branchlets and leaves without prickle-like glands; calyx -teeth very short, low-triangular 



1. A. fruticosa. 



Branchlets and leaf-rachises with prickle-like glands; calyx-teeth acute-triangular or lanceolate, 



V2 to % as long as the tube 2. A. calif ornica. 



1. A. fruticosa L. Mock Indigo. Shrub 3 to 8 feet high ; herbage minutely 

 pubescent; leaflets 11 to 15, ovate to oblong, % to 1% inches long, shortly petiol- 

 uled; stipules and bracts (as also in no. 2) linear-lanceolate, caducous; racemes 3 

 to 9 inches long; calyx canescent, especially on the teeth, with many glands; banner 

 dark purple, truncatish or notched, 3 lines long ; pod 4 lines long, with conspicuous 

 blister-like glands. 



Along streams in the foothills and mountains, 100 to 6500 feet : San Bernardino 

 Mts. and south to San Diego Co. South to Lower California, east to Arizona, the 

 Mississippi Valley and Florida. May-July. 



Locs. — Santa Ana Canon, Orange Co., J. T. Howell 2449; San Bernardino, Parish; Vande- 

 venter Flat, head of Palm Canon of San Jacinto, Jepson 1343 ; Santa Eosa Indian Village, Santa 

 Eosa Mts., Jepson 1446; Eamona, E. Brandegee ; Santa Ysabel, Alderson 1716; Witch Creek, 

 Alderson 222; Jamacha, Chandler 5279; Jacumba, Cleveland; San Diego, H. P. Kelley. 



Eefs. — AiiORPHA FRUTICOSA L. Sp. PL 713 (1753), type loc. Carolina; Jepson, Man. 556 

 (1925). A. occidentalis Abrams, Bull. N. Y. Bot. Card. 6:394 (1910), type loc. San Diego 

 Eiver near old San Diego Mission, Atrams 3425. 



2. A. calif ornica Nutt. Mock Locust. Shrub 4 to 9 feet high; herbage 

 minutely pubescent ; leaflets 11 to 27, oblong-elliptical, mucronulate at the retuse 

 apex, shortly petioluled, l^ to 1^/2 inches long; rachis with prickle-lil?;e glands, the 

 prickles slender or pustulate-dilated at base, often more or less deciduous late in 

 the season ; racemes 2 to 5l^ inches long ; calj^x pubescent ; corolla dark purple, 

 3 lines long ; pod 2^2 lines long, with many low circular glands which are depressed 

 or somewhat excavated in the center. 



"Wooded canons, 500 to 6000 feet : northern Sierra Nevada foothills from Shasta 

 Co. to Placer Co. ; Marysville Buttes ; Napa Co. to San Luis Obispo Co. ; Mt. Pinos ; 

 south to the San Gabriel, San Bernardino, San Jacinto and Santa Ana mountains. 

 Lower California. May-July. 



