694 



LABIATAE (MINT FAMILY) 



Hients ; anther-cells divergent and at length confluent. Low annuals, some- 

 what clammy-glandular and balsamic, branched, with entire leaves, and mostly 

 solitary 1-flowered pedicels terminating the branches, 

 becoming lateral by the production of axillary branch- 

 lets, and the flower appearing to be reversed, namely, 

 the short teeth of the calyx upward, etc. Corolla blue, 

 varying to pink, rarely white, small ; fl. in summer and 

 autumn. (Name composed of 0pL, hair, and err^a, 

 stamen, from the capillary filaments.) 



1. T. dich6tomum L. (BASTARD PENNYROYAL.) 

 Viscid with rather minute pubescence; leaves lance- 

 oblong or rhombic-lanceolate, rarely lance-linear, short- 

 petioled ; lower lobe of the corolla oblong, longer than 

 the remaining broader ones. Sandy fields, Me. and 

 Vt. to Ky., Mo., and Tex. FIG. 886. 



2. T. lineare Walt. Puberulent, more slender and 

 less forked ; leaves linear, nearly smooth. In sandy 



886. T. dichotomum x %. grO und near the coast, Ct. to La. 



5. SCUTELLARIA L. SKULLCAP 



Calyx bell-shaped in flower, splitting to the base at maturity, the lips entire, 

 the upper usually falling away. Corolla with an elongated curved ascending 

 tube, dilated at the throat ; the upper lip entire or barely notched, the lateral 

 lobes mostly connected with the upper rather than the lower lip ; the lower lobe 

 or lip spreading and convex, notched at the apex. Stamens ascending under 

 the upper lip ; anthers approximate in pairs, ciliate or bearded, those of the 

 lower stamens 1-celled (halved), of the upper 2-celled and heart-shaped. Bitter 

 perennial herbs, not aromatic, the short peduncles or pedicels chiefly opposite, 

 1-flowered, often 1-sided, axillary or spiked or racemed ; fl. in summer. (Name 

 from scutella, a dish, in allusion to the appendage of the fruiting calyx.) 



1. Nutlets wingless, mostly marginless, on a low gynobase. 



* Flowers small (5-8 mm. long}, in axillary and sometimes terminal 1-sided 



racemes. 



1. S. laterifldra L. (MAD-DOG S.) Smooth ; stem upright, much branched, 

 1-8 dm. high ; leaves lanceolate-ovate or ovate-oblong, pointed, coarsely serrate, 

 rounded at base, petioled, 3-9 cm. long, the lower floral ones similar ; flowers 

 blue, rarely pink or white. Wet shaded places, common. July-Sept. 



* * Flowers solitary in the axils of the upper leaves or in terminal single or 



panicled racemes / the floral leaves mostly smaller than the cauline. 



i- Flowers 1-3 cm. long principal stem-leaves more than 2 cm.'long. 



*+ Stem-leaves all cordate, crenate-toothed, slender-peti- 

 oled ; lateral lobes of the corolla almost equaling the 

 short upper lip. 



2. S. versicolor Nutt. Soft-hairy, the hairs of the 

 inflorescence, etc., partly viscid-glandular; stem mostly 

 erect, 3-9 dm. high ; leaves ovate or round-ovate, very 

 veiny, rugose, the floral reduced to broadly ovate subentire 

 bracts about equaling the glandular-hairy calyx ; racemes 

 mostly simple ; corolla bright blue, with lower side and lip 

 whitish. (S. cordifolia Muhl. ?, nomen subnudum.) 

 Banks of streams, Pa. to Wise., Minn., and southw. 

 June, July. FIG. 887. 



3. S. saxatilis Riddell. Glabrous or slightly hairy; 

 stem weak, ascending, 1-5 dm . long, often producing run- 

 ners, branched; leaves ovate or ovate-oblong, 1.5-5 cm. 

 long, thin, obtuse; upper bracts oblong or ovate, small, 



887. S. versicolor X 



