218 LENTIBULARIACEAE 



Leaves dichotomously divided, with very stiort divisions; corolla 4-6 mm. wide; spur a 

 mere protuberance. 2 U. minor. 



2. PINGTJICULA (Tourn.) L. Butterwort. 



Lower lip of the corolla about 15 mm. long; base of the corolla conic, ending in a straight 



flliform cyllndrlc spur. 1 P- macroceras. 



Lower lip of the corolla 10-12 mm. long; base of the corolla ovoid-conic, ending in a 



tapering, slightly recurved spur. 2. P. vulgaris. 



Family 119. OROBANCHACEAE. Beoom-rape Family. 



Flowers subtended by bractlets. 1. Mtzohrhiza. 



Flowers without bractlets. 2. Thalesia. 



1. MTZORRHIZA Philippi. Broom-rape. 



Flowers all manifestly pedicelled; inflorescence corymbose; anthers woolly. 



1. M. corymbnsa. 

 Flowers sessile or nearly so; only the lowest sometimes short-pedicelled; flowers spicate 

 or paniculate. 

 Inflorescence spicate. though sometimes branched; corolla usually purple; stem not 

 bulbose at the base. 

 Corolla 20-25 mm. long; anthers woolly. 2. M. muUiflora: 



Corolla 15-20 mm. long; anthers glabrous. 3. M. ludoviciana. 



Inflorescence usually a loose elongated panicle; coroUa yellow, about 12 mm. long; 

 stem bulbose at the base. 4. M. pinorum 



2. THALESIA Raf. Cancer-root. 



Calyx-lobes subulate, much longer than the tube; stem very short. 1-3-flowered. 



Corolla Ulac or pink. 2 cm. or less long; tube 4—5 mm. wide at the throat; lobes oblong, 



acutish or obtuse. 1 T. sedi. 



Corolla deep purple, often with yellowl-sh veins: lobes oval or semi-orbicular, rounded 



Corolla 15-18 mm. long; tube strongly curved, 4-5 mm. wide at the throat. 



2. T. minuta. 

 Corolla 20-30 mm. long; tube not so strongly curved, 5-8 mm. wide at the throat. 



3. T. purpurea. 

 Calyx-lobes lanceolate or triangular, about equalling the tube; stem evident, several- 

 flowered. 



Corolla piuplish, its lobes roimded or merely mucronate; sepals more or less acumin- 

 ate. 4. T. fasciculata 

 Corolla sulphur-yellow, its lobes acute; sepals a«ute. 5. T. lutea. 



Family 120. MARTYNIACEAE, Unicohn-plant Family. 

 1. MARTYNIA L. Unicorn-plant. l. M. Louisiana. 



Family 121. PLANTAGINACEAE. Plaxtain Family. 



1. PLANTA60 (Tourn.) L. Plantain, Ribgrass. 



Flowers all perfect; corolla not closed over the fruit; stamens 4. 



Leaves lanceolate to ovate; neither leaves nor spike silky pubescent or lanate; sta- 

 mens in all the flowers long-exserted. 

 Spike cylindrical ; seeds not concave on the faces. 



Leaves ovate, abruptly contracted at the base; seeds more than 2 in each 

 ceU. 

 Pyxis dehiscent at the middle, round-ovoid, obtusish; leaves usually thick 



and the dense spike obtuse. 1. P. major. 



Pyxis dehiscent far below the middle, elongate-ovoid, very acute; leaves 

 thin and the lax spike acute. 2. P. asialica. 



Leave? lanceolate, gradually, tapering into the petioles; seeds not more than 2 

 in each cell. 

 Leaves thin: plant not wooUy at the base. 3. P. Tweedyi. 



Leaves thick. 



Plant sparingly pubescent, with red or brown wool at the base. 



4- P. eriopoda. 

 Plant copiously villous with jointed hairs, not woolly at the base. 



5. P. scptata. 

 Spike short, oblong, 1-3 cm. long; seeds concave on the faces; leaves narrowly 

 lanceolate. 6. P. lanceolata. 



Leaves linear; leaves or peduncles or both more or less pubescent with long silkj- 

 hairs; anther in the more fertile flowers included; seeds solitary in each cell 

 concave on the faces. 

 Bracts aiistate or herbaceous, at least the lower ones 2-many times as long as 

 the flowers. 

 Bracts all much exceeding the flowers. 



Plant dark green; spike compact. 7. P. aristata. 



Plant light green; spike more slender. 8. P. spinulosa 



Upper bracts scarcely exceeding the flowers. 9. P. xerodea. 



