— 245 — 



Persia: N. 2179, prov. Gilan, in forests at Imam Sade Hashim. 

 Sept. 16. 1899. 



33. Thymus Serpyllum L. var. angustifolius Wallr. 

 Ferghana: N. 352, at Issik bulak near Osh. June 16. 1898. 



34. Mentha aquatica L. var. persica Briq. var. nov. 



Planta circ. 25 cm alta. Caulis ramosus, debilis, ramis divergenti- 

 adscendentibus, gracilibus, breviter adpresse pubescentibus, superne cine- 

 rascentibus. Folia pro specie parva, superficie 2 — 2,5 X 1,5 — 1,8 cm, 

 ovata, apice obtusa vel subobtusa, marginibus infra medium convexioribus, 

 supra viridia pubescentia, subtus pallide virentia, breviter adpresse prae- 

 sertim ad nervos pubescentia, petiolo brevi densius vestito 5 mm longo 

 praedita; nervatio simplex vel fere simplex, subtus aliq. prominula; ser- 

 ratura constans ex dentibus crenatis parvis, crebris, culminibus obtusius- 

 culis circ. 0,5 mm altis et 1 — 2 mm distantibus. Capitula pro specie parva. 

 Calix fere 3 mm longus, extus subadpresse brevissime pubescens. 



Var. denticulatae H. Braun (in Verh. zool.-bot. Ges. Wien XL, 480 

 (1890); Briq. in Jacc. Cat. fl. valais p. 441) valde affinis, differt indu- 

 mento brevi plantam totam cinerascentem efficiente. 



Persia: N. 2162, in forests at Resht. Sept. 14. 1899. 



35. Mentha longifolia Huds. subsp. Royleana Briq. in Engl. u. 

 Prantl. nat. Pflanzenfam. IV, 3 a p. 322 (1897). 



var. inter cedens Briq., var. nov. 



Planta ad 50 cm alta. Caulis adscendens, ramosus, ramis adscen- 

 dentibus, breviter adpresse canescenti-pubescentibus , internodiis medio- 

 cribus. Folia oblongo-lanceolata, mediocria, superficie ad 4x1,5 cm, 

 apice acuminata, marginibus leviter convexis, basi subcordata, petiolo brevi 

 incano 2 — 4 mm longo insidentia, utrinque breviter incano-tomentella, 

 tomento glandulas sessiles occulente; nervatio simplex subtus haud pro- 

 minula; serratura constans ex dentibus mediocribus, acutis, prorsus versis, 

 culminibus infra 1mm altis et 3 — 4 mm distantibus. Spicastrum satis 

 debile, verticillastris (inferioribus exceptis) congestis, cinerascentibus. Calix 

 parvus circ. 1,6 mm altus, tubo 1 mm profundo, dentibus lanceolatis vix 

 ultra 0,5 mm longis. 



Var. tenellae Briq. (in Bull. Herb. Boiss. II, 695, 1894) affinis a 

 qua foliis utrinque incano-tomentosis differt. Eandem vel fere eandem 

 plantam distribuit Litwinow sub no. 68 ex Turcomania ad rivulum 

 Ashabadka. 



Transcaspia: N. 1780, at a stream near Merw. June 6. 1899. 



36. Mentha longifolia Huds. subsp. modesta Briq. in Engler u. 

 Prantl Nat. Pflanzenfam. IV, 3 a p. 322. 



var. Pamirensis Briq. var. nov. 



