786 



Labiatae 



lA. Nutlets white-pilosulous; corolla dark purple 1. P. trichocarpus 



IB. Nutlets glabrous; corolla pale blue, blue-purple or white. 

 2A. Corolla 5-12 mm. long, the tube 1-3 times as long as the limb. 



3A. Calyx nearly equally 5-lobed, with fine ascending hairs; corolla 5-10 mm. long, with small dark spots on upper lip inside. 



4A. Flowers 5-7 mm. long, pale blue; stamens or style exserted; leaves 6-15 cm. long 2. P. japoniciis 



4B. Flowers 8-10 mm. long, blue-purple; stamens and styles included; leaves 3-4 cm. long 3. P. inflexus 



3B. Calyx bilabiate, with spreading hairs or pilose; corolla 6-12 (-15) mm. long, without dark spots, the lower lip bifid, usually 

 longer than the upper. 

 5A. Leaves broadly lanceolate to ovate, acuminate. 



6A. Calyx-teeth acute; bracts ovate to ovate-cordate 4. P. umbrosus 



6B. Calyx-teeth mucronate; bracts broadly lanceolate to ovate 5. P. shikpkianus 



5B. Leaves ovate-orbicular to ovate, caudate 6, P. \ameba 



2B. Corolla 15-20 mm. long, the tube 4-6 times as long as the limb. 



7A. Cymes short, the pedicels puberulent, less than 1 cm. long; upper calyx-teeth short, obtuse 7. P. longittibus 



7B. Cymes effuse, the pedicels slender, glabrous, usually 1-2.5 cm. long; upper calyx-teeth lanceolate, acute 8. P. effusus 



1. Plectranthus trichocarpus Maxim. P. inconspicuus twice as long as the calyx; nudets slightly compressed, orbicu- 



Maxim., non Miq.; hodon trichocarpus (Maxim.) Kudo; lar, 1.2 mm. long, with darker reticulations, smooth. Sept.- 



Amethystanthus trichocarpus (Maxim.) Nakai Kurobana- Oct. Thin woods and thickets in hills and low mountains; 



HiKi-oKOSHi. Rhizomatous; stems tufted, 50-150 cm. long, Hokkaido, Honshu, Shikoku, Kyushu; common and variable, 



branched in upper part, rarely minutely recurved-puberulent 4 Plectranthus umbrosus (Maxim.) Makino. P. in- 



on the angles; leaves broadly deltoid-ovate to broadly lanceo- flexus var. umbrosus Maxim.; Isodon umbrosus (Maxim.) 



late, 6-15 cm. long, 2.5-7 cm. wide, acuminate, broadly cuneate Hara; Amethystanthus umbrosus (Maxim.) Nakai; /. inflexus 



and gradually decurrent at base to a winged petiole, toothed, var. umbrosus (Maxim.) Kudo Inu-yama-hakka. Stems 



usually thinly pilose above, appressed-puberulent on nerves 60-80 cm. long, recurved-hairy on the angles; leaves broadly 



beneath; verticils loose, distant, axillary, on long slender pe- lanceolate or narrowly ovate-oblong, 5-10 cm. long, 1-3.5 cm. 



duncles, those in the upper part forming a loose terminal wide, long-acuminate, cuneate and long decurrent at base, 



raceme, the pedicels slender; calyx puberulent, 3-3.5 mm. long acutely-toothed, thinly pilose on both surfaces especially on 



in fruit, the teeth deltoid; corolla dark purple, 5-6 mm. long, nerves beneath, petiolate; racemes loose, terminal and axillary, 



the tube as long as the lower lip and calyx; nudets obovoid, 10-25 cm. long, the bracts ovate to ovate-cordate, the pedicels 



scarcely flattened, about 1.5 mm. long, white-pilosulous. rather long; calyx spreading-puberulent and glandular-dotted, 



Aug.-Sept. Along streams and in clearings in mountains; about 4 mm. long in fruit, the teeth narrowly deltoid, acute; 



Hokkaido, Honshu (Tango Prov. and eastw.). corolla blue-purple, 8-10 mm. long, the tube rather broad, 



2. Plectranthus japonicus (Burm.) Koidz. Scutellaria gibbous, about twice as long as the calyx and slighdy longer 

 (?) japonica Burm.; Ocimum rugosum Thunb.; P. maxim- than the lower Up; nudets orbicular, 1.2 mm. long, slighdy 



owiczii Miq.; P. buergeri Miq.; P. glaucocalyx var. japonicus flattened, obsoletely reticulate, smooth. Sept.-Oct. Moun- 



(Burm.) Maxim.; Isodon japonicus (Burm.) Hara; /. glauco- tains; Honshu (Fuji and Hakone regions). 



calyx var. japonicus (Maxim.) Kudo; Amethystanthus japoni- 5. Plectranthus shikokianus (Makino) Makino. Isodon 

 cus (Burm.) Nakai Hiki-okoshi. Stems 50-100 cm. shi\o\ianus (Makino) Hara; /. excisus var. shi\o\ianus (Ma- 

 long, with recurved short hairs on the angles; leaves ovate to kino) Kudo; /. lanceus (Nakai) Kudo; P. lanceus Nakai; 

 narrowly so, 6-12 (-15) cm. long, 3.5-7 cm. wide, short-acumi- P. axillariflorus Honda; Amethystanthus lanceus (Nakai) 

 nate or acute, truncate to cuneate-truncate at base, paler be- Nakai; A. manabeanus Honda; 7. manabeanus (Honda) Hara 



neath and pilose at least on nerves; racemes loose, terminal and Taka-kuma-hiki-okoshi. Stems 50-80 cm. long, with 



in upper axils, elongate, the pedicels short; calyx 3-4 mm. long, recurved short hairs, especially on the angles; leaves broadly 



gray-puberulent, the teeth deltoid; corolla pale purple, 5-7 lanceolate or narrowly ovate, 5-10 cm. long, 1.5-2.5 cm. wide, 



mm. long, the tube slightly inflated at base on back, about long-acuminate, cuneate at base, acutely toothed, thinly pilose 



twice as long as the calyx, slightly longer or nearly as long as above, loosely puberulent beneath or nearly glabrous on both 



the lower lip; nutlets ellipsoidal, slightly flattened, obsoletely surfaces, petiolate; racemes 5-15 cm. long, rather narrow; 



reticulate, loosely granular above.- Sept.-Oct. Honshu, Shi- bracts broadly lanceolate to ovate; calyx 3.5-5 mm. long in 



koku, Kyushu. Korea. fruit, loosely puberulent, the teeth narrowly deltoid, mucro- 



3. Plectranthus inflexus (Thunb.) Vahl ex Benth. Oci- nate; corolla about 10 mm. long, rather thick, the tube nearly 

 m.um inflexum Thunb.; Isodon inflexus (Thunb.) Kudo; as long as the lower lip, gibbous, 2 or 3 times as long as the 

 Amethystanthus inflexus (Thunb.) Nakai; 7. inflexus var. calyx; nutlets broadly elliptic, about 1.2 mm. long, rather 



macrophyllus (Maxim.) Kudo; 7. inflexus var. transticus Kudo smooth, slightly flattened. Sept.-Oct. Woods and thickets 



' Yama-hakka. Stems 40-80 cm. long, branched, with in mountains; Honshu (centr. and s. distr.), Shikoku, Kyushu. 



recurved short hairs especially on the angles; leaves broadly 6. Plectranthus kameba (Okuyama) Ohvi'i. Isodon 



deltoid-ovate or broadly ovate, 3-6 cm. long, 2-4 cm. wide, \ameba Okuyama; Plectranthus excisus sensu auct. Japon., 



acute to subobtuse, broadly cuneate and decurrent on the non Maxim.; 7. excisus Kudo, excl. basionym; Amethyst- 



winged petiole, coarsely toothed, thinly pilose above and on anthus excisus Nakai, excl. basionym Kameba-hiki- 



nerves beneath; racemes loose, terminal and axillary, narrow, okoshi. Tufted perennial; stems 50-100 cm. long, with 



elongate, the pedicels and peduncles of the cymes short; calyx recurved short hairs on the nodes; leaves ovate-orbicular or 



5-6 mm. long in fruit, ascending-puberulent, the teeth nar- ovate, 5-8 cm. long and as wide, truncate to incised at apex, 



rowly deltoid; corolla blue-purple, rarely white, 8-10 mm. with a long-caudate tip, 2-5 cm. long, cuneate-truncate at the 



long, the tube rather broad, as long as the lower lip, about winged-petiolate base, acutely toothed, thinly puberulent on 



