15. Dasistoma Raf. Mullein Foxglove 

 A monotypic genus. Sometimes misspelled Dasystoma in some works. 

 1. Dasistoma macrophylla (Nutt.) Raf. 



Annual, rather pubescent, to about 2 m. high, branched, said to be parasitic 

 on Aesculiis; leaves opposite, ovate to lanceolate in outline, the margins subentire 

 to crenate-serrate, to about 3 dm. long and 1 dm. wide, the lower ones pinnately 

 divided and with the broad lanceolate divisions pinnatifid and incised, progres- 

 sively smaller up the stem with the uppermost ones narrowly lanceolate; flowers 

 in an elongate leafy spike; calyx slightly zygomorphic, about 1 cm. long, the tube 

 cup-shaped, the 4 lower oblong lobes obtuse and about equaling the tube, the 

 upper median lobe shorter and narrower; corolla tube narrowly campanulate, 

 incurved, about 1 cm. long, woolly within, the spreading limb about 15 mm, 

 wide; stamens 4, strongly didynamous; filaments villous, inserted near middle of 

 corolla tube and barely exserted; anthers oblong, completely dehiscent; style 

 somewhat dilated and notched at apex; capsule globose-ovoid, about 1 cm. long, 

 loculicidal, each valve terminated by a short flat triangular beak; seeds angular, 

 2-3 mm. long, the papery coat reticulate. Seymeria macrophylla Nutt. 



In rich woods and on banks and edges of streams in Okla. (Murray Co.) and 

 n.-cen. Tex. (Dallas Co.), June-Sept.; from W. Va. to Wise, la. and Neb., s. to 

 Ga., Ala,, Miss., La. and Tex. 



16. Agalinis Raf, 



Annual (in ours) or perennial herbs with usually thin stems and branches; 

 leaves linear, mostly entire, opposite, tending to become alternate on the 

 branches; flowers often large for the plant, arising from the axils of the some- 

 what reduced upper leaves to form a raceme or (by reduction) appearing to 

 be terminal, frequently only one flower of pair developed; calyx regular, gamo- 

 sepalous, the tube campanulate to hemispheric, usually much longer than the 

 lobes; corolla zygomorphic, membranous, pink to purple, sometimes white, com- 

 monly with yellow lines and reddish-purple spots in throat; corolla tube cam- 

 panulate, often somewhat distended on the lower side; corolla lobes all equally 

 distinct, commonly marginally ciliate, the lower 3 spreading, the upper 2 arched 

 and spreading or somewhat recurved; stamens 4, didynamous, the lowef pair the 

 longer; filaments pubescent (at least toward base); anther sacs obtuse to cuspidate 

 at base; capsule typically globose or subglobose, loculicidal. 



About 60 species in temperate America. 



1. Pedicels mostly 1 cm. long or more, typically filiform and always much longer 



than the calyx at anthesis (2) 

 1. Pedicels mostly less than 1 cm. long, stoutish or slender and about as long 



as or shorter than the calyx at anthesis, rarely with some slightly 



longer than the calyx (3) 



2(1). Plant fleshy and succulent, bushy-branched below and with elongate sub- 

 scapose racemes above; leaves and calyx lobes obtuse or essentially 

 so; in saline habitats 1. A. maritima. 



2. Plant not fleshy, more uniformly branched; leaves and calyx lobes acute to 



acuminate; in nonsaline soils 2. A. tenuifolia. 



3(1). Plant fleshy and succulent, bushy-branched below and with elongate sub- 

 scapose racemes above; leaves and calyx lobes obtuse; in saline 

 habitats 1. A. maritima. 



3. Plant not fleshy, more uniformly branched; leaves and calyx lobes acute to 



acuminate; in nonsaline soils (4) 



1495 



