Mint Family. 131 



LIPP1A L. Ours a perennial herb, with opposite leaves, and small bracted 

 flowers. Calyx 2-parted. Corolla funnelform, 2-lipped; upper lip notched; 

 lower larger, 3-lobed. Stamens didynamous, included. Fruit a dry drupe, 

 3-celled, 2-seeded. 



L. lanceolata Mx. Fog-frail. Stem 4-ang-led, suberect, from an exten- 

 sively creeping - base; leaves obovate to ovate, base cuneate, mostly tapering- 

 into a petiole, serrate, pinnately veined, veins passing- to the sinuses; flowers 

 pale blue, in closely bracted heads which are on long- axillary peduncles. 

 River banks; July-September; frequent in the eastern counties but extending 

 westward across the state; Clayton, Dubuque, Clinton, Scott, Muscatine, Lou- 

 isa, Lee, Henry, Johnson, Van Buren, Wapello, Linn, Story, Chickasaw, and 

 Fremont counties. 



PHRYMA L. Perennial, with coarsely toothed ovate petioled leaves, and 

 small purplish or roseate opposite flowers arranged in slender terminal 

 spikes. Calyx 2-lipped; upper lip 3-toothed; the lower 2-toothed. Corolla 

 2-lipped; upper lip emarginate; the lower 3-lobed. Stamens included. Fruit 

 dry, oblong, lcelled, 1-seeded. 



P. leptostachya L. Lopseed. Stem 2-3 feet high, somewhat pubescent, 

 with slender branches; leaves thin, acute or acuminate, lower long--petioled, 

 upper nearly sessile;' flowers on very short 2-bracteolate pedicels, erect at first, 

 deflexed in fruit. Rich open woods, thickets: June-August; common. 



LABI AT AE B. ./».«. Mint Family. 

 A large and natural order consisting of .annual or perennial herbs, with 

 square stems, opposite aromatic exstipulate leaves, and axillary c.ymose 

 flower clusters which are frequently collected into terminal racemes, 

 spikes, or heads. Calyx usually nerved, persistent, regular or 2-lipped, 

 5-lobed or 5-toothed, rarely 4-toothed. Corolla usually 2-lipped; upper 

 lip 2-lobed or rarely entire, external in the bud; lower 3-lobed. Stamens 

 4. didynamous, or only 2, inserted on the tube of the corolla. Ovary 

 superior, deeply 4 lobed, forming ii: fruit 4 seed-like 1-seeded nutlets or 

 achenes. Style solitary, central, 2-1'obed above. 



A. Ovary 4-lobed, the style not basal; nutlets rugose reticulated, attached 

 laterally. 



Tribe Ajugoideae. Calyx 5-10-nerved; stamens 4, parallel, ascending, 

 mostly exserted from the upper side of the corolla; nutlets obovoid, dry. 

 Isanthtjs. Corolla of 5 nearly equal lobes; stamens scarcely if at all exserted. 

 Trichostema. Corolla-lobes nearly equal, declined ; stamens exserted. 

 Tbuckium. Corolla Irregular, deeply cleft between the two lobes of the upper lip; 

 stamens exserted. 



B. Ovary 4-parted, the style basal; nutlets smooth or granulate, attached 

 by their bases. 



Tribe Satureineae. Corolla 2-lipped; upper lip galeate or concave; 

 stamens 4 or 2, not declined, the upper pair shorter or wanting; anthers 2- 

 celled. 



* Corolla nearly equally 4-lobed; stamen* erect, distant. 

 Mentha. Stamens 4; aromatic fragrant herbs. 

 Lycopos. Fertile stamens 3, the upper pair of sterile firaments or wanting. 



* * Corolla more or less 2-lipped; tipper Up erect,'entire or notched. 

 Pvcnanthemdm. Flowers in dense capitate heads; stamens 4, lower pair a little shorter. 

 Hedeuma. Flowers in axillary clusters; fertile stamens 2; the upper pair rudimentary 

 or wanting. 



