. Brigham Young University science bulletin. Biology -- Periodicals. 76 Young University Science Bulletin lobes narrow, spreading or reflexed in fruit; co- rolla white, the tube shorter than the calyx, lobes broadly oval, the throat nearly closed by prom- inent crests; stamens included; style very short; nutlets flattened, thin, widely divergent either radiately or in pairs, their margins, at least to- ward the apex, with a row of hooked bristles. Type species; CA'noglossuni lateriflorum Lan. 1. Nutlets orbicular or nearly so, both the body aiul the very thin conspicuous wing beset wi
. Brigham Young University science bulletin. Biology -- Periodicals. 76 Young University Science Bulletin lobes narrow, spreading or reflexed in fruit; co- rolla white, the tube shorter than the calyx, lobes broadly oval, the throat nearly closed by prom- inent crests; stamens included; style very short; nutlets flattened, thin, widely divergent either radiately or in pairs, their margins, at least to- ward the apex, with a row of hooked bristles. Type species; CA'noglossuni lateriflorum Lan. 1. Nutlets orbicular or nearly so, both the body aiul the very thin conspicuous wing beset with slender uncinate brisdes 4. P. setosa 1. Nutlets oblong or linear, the body without uncinate bristles (2). 2. Nutlets heteromorphic, 1 of each divergent pair wingless, or merely margined, the other with a broad somewhat incurved uncinate-toothed wing 1. r. hetewcarpa 2. Nutlets not heteromorphic, all 4 winged-margined or toothed (3). 3. Margin of nutlet conspicuous, the teeth confluent at base 2. P. platycaqm 3. Margin of the nutlet very narrow or wanting, the teeth being nearly or (juite distinct, subulate, nut- lets strongly recurved 3. P. recurvata 1. Pectocarya hetewcarpa Johnst. Joum. Am. Arb. 20:399. 1939. Type: Com Springs, Chuckwalla Valley, Riverside County, Cali- fornia. Pectocarya penicillata var. heterocarpa Johnst. Contr. Gray Herb. 70:37. 1924. Diffusely branched from the base; stems slender, ascending or spreading, 3-15 cm long, strigose and canescent throughout; leaves nar- rowlv linear, 1-3 cm long, 1-2 mm wide, the hairs on tile basal ones often pustulate at base; corol- la minute, its limb about mm broad; fruit- ing nutlets widely divergent, dissimilar, 2 nar- rower and with or without a narrow margin, and 2 prominentlv winged-margined, the wings pec- tinately at the apex, irregular, few toothed and with or without scattered bristles on the sides. Sandy or gravelly slopes and plains. Southwestern Utah, southern Nevada south through Arizona and
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