BUCKBEAN FAMILY 365 



the upper often ovate-lanceolate; inflorescence a broad many-flowered panicle; calyx-lobes 

 lanceolate 8-20 mm. long; corolla greenish white, flecked with black, the lobes about as long 

 as the calyx; gland U-shaped, fringed all around, with a shallow pocket at base, crown-scales 

 wanting; capsule long-conic, 12-16 mm. long; seeds wrinkled and conspicuously faveolate. 



Open ground on benches and slopes. Upper Sonoran and Arid Transition Zones; San Gabriel Mountains, 

 southern California, to the San Pedro Martir Mountains, Lower California, east to Arizona. Type locality: 

 "mountains east of San Diego," California. April-July. 



9. Swertia albomarginata (S. Wats.) Kuntze. Desert Swertia. Fig. 3819. 



Frascra albomarginata S. Wats. Bot. King. Expl. 280. 1871. 

 Swertia albomarginata Kuntze, Rev. Gen. PI. 2: 431. 1891. 

 Leucocraspedum albomarginatum Rydb. Fl. Rocky Mts. 665, 1065. 1917. 



Stems several or often solitary from a somewhat woody perennial taproot, 2-6 dm. high ; 

 herbage glabrous throughout. Leaves pale green, conspicuously white-margined, coriaceous, the 

 basal oblanceolate, about 1 cm. wide, narrowed to a winged petiole, stem-leaves in whorls of 

 3 or 4, smaller, linear, somewhat conduplicate at base ; inflorescence a broad corymbose panicle ; 

 bracts usually opposite, the upper much-reduced; calyx-lobes linear-subulate, 3-4 mm. long; 

 corolla-lobes ovate-acuminate, 8-10 mm. long, greenish yellow, veined and often flecked with 

 purple; gland linear, shallowly 2-lobed at apex, rather sparsely fimbriate; crown wanting; 

 capsule 7-10 mm. long, flattened contrary to the valves ; seeds oblong, 3-4 mm. long, not winged. 



Dry desert slopes, Upper Sonoran Zone; Providence Mountains, southern California, eastward through 

 southern Nevada and northern Arizona to southern Utah and southwestern Colorado. Type locality: near St. 

 George, southern Utah. June-Aug. 



10. Swertia tubulosa Coville. Kern Swertia. Fig. 3820. 



Frasera tubulosa Coville, Proc. Biol. Soc. Wash. 7: 71. 1892. 

 Swertia tubulosa Jepson, Man. Fl. PI. Calif. 767. 1925. 



Stems solitary or few from the somewhat woody root, 25-60 cm. high ; herbage glabrous and 

 glaucous. Leaves conspicuously white-margined, the basal rather numerous, spatulate, 4-9 cm. 

 long, 1-1.5 cm. wide, narrowed to an elongated winged petiole, recurved and mucronate at apex, 

 the stem-leaves in whorls of 5 or 6, conduplicate at base ; inflorescence a narrow spicate panicle, 

 more or less interrupted below ; pedicels 2-20 mm. long ; calyx-lobes linear-subulate, 6-8 mm. 

 long ; corolla-lobes white, oblong-obovate, acuminate, a little exceeding the calyx ; gland none ; 

 crown forming a deeply 2-lobed tube, laciniate at the apex, the anterior lobe shorter and both 

 lobes lacerate-fimbriate ; capsule elliptic, strongly flattened, 7-9 mm. long ; seeds 1 or 2, flat- 

 tened, 5-7 mm. long, cellular-muriculate. 



Open pine forests, Canadian Zone; basin of the Upper Kern River, from Farewell Gap to Olancha Mountain, 

 southern Sierra Nevada, Tulare County, California. Type locality: under Finns Jeffreyi, Soda Springs, on the 

 north fork of Kern River, California. June-Aug. 



Family 122. MENYANTHACEAE. 



BucKBEAN Family. 



Perennial aquatic or marsh herbs, from perennial rootstocks. Leaves basal or 

 alternate, entire, crenate or trifoliolate. Flowers clustered, regular, often heterogo- 

 nous. Calyx deeply 5-parted or 5-lobed, persistent, free from the ovary or the 

 tube adnate to the lower portion. Corolla funnelform or rotate, 5-lobed or 5-parted, 

 the lobes induplicate-valvate in the bud. Stamens 5, borne on the corolla-tube, alter- 

 nate with the lobes ; filaments usually short ; anthers longitudinally dehiscent, in 

 ours sagittate; pollen 3-angled. Ovary superior, 1 -celled, the two parietal placentae 

 sometimes intruded ; style present or sometimes none. Fruit a capsule or indehis- 

 cent. Seed-coat crustaceous, smooth and shining. 



A small family of 5 genera and about 35 species of wide geographical distribution. 



Leaves trifoliate, the leaflets entire; flowers in a simple raceme. 1. Menyanthes. 



Leaves simple, reniform, crenate; flowers in a simple or compound cyme. 2. Nephrophyllidium. 



1. MENYANTHES [Tourn.] L. Sp. PI. 145. 1753. 



A perennial glabrous marsh herb, with creeping rootstocks and glabrous herbage. 

 Leaves alternate, basal, with long petioles and 3-folioIate blades. Flowers white or pur- 

 plish, racemose, or panicled on long lateral scapes or peduncles. Calyx 5-parted into 

 oblong or lanceolate segments. Corolla short-funnel form, the lobes spreading, fimbriate 

 or bearded on the inner surface. Filaments filiform; anthers sagittate. Disk of 5 hypogy- 

 nous glands. Ovary 1-celled; style subulate, persistent; stigma 2-lamellate. Fruit an 



