Heller: PLANTS OF THE HAWAIIAN ISLANDS. 881 



' STACHYTARPHETA Vahl. Enum. 1:205. 1805. 



Stachytarpheta dichotoma (R. & P.) Vahl. Enum. 1: 207. 1805. 

 Verbena dichotoma R. & P. Fl. Per. 1;23. 1798. 

 Two forms of this species were collected. One, No. 2091, 

 which is most common in the immediate vicinity of Honolulu, 

 is woody only at the base, the stout, herbaceous branches 

 somewhat weak, about two feet long, almost glabrous, and 

 somewhat glaucous. The other form, No. 1098, is usually 

 found at higher elevations, and even extends to the lower edge 

 of the forest. It is an erect, branching shrub, only the young 

 branches herbaceous, On Kauai, bushes five feet high, with 

 stems an inch in diameter were seen in Hanapepe valley. The 

 leaves on this form are brighter green, somewhat smaller, and 

 more sharply serrate. It is possible that the two are distinct 

 species, but No. 2091 would seem to be a young state of the 

 latter. Hillebrand describes it as an "erect herb," and records 

 it from the island of Hawaii, "districts of Hilo and Kona," only. 



YERBENA L. Sp. PL 18. 1753. 

 Verbena bonariensis L. Sp. PL 20. 1753. 



A widely diffused tropical weed, introduced many years 

 ago, and now found on all of the islands of the group. It can 

 be found anywhere from the low, cultivated ground near the 

 coast, to pasture land high up in the mountains; everywhere, 

 in fact, except in the deep forest where introduced plants 

 rarely find a lodging. 



March to September (2088); original locality, "in agro 

 Bonariensi." 



VITEX L. Sp. PL 638. 1753. 

 Vitex trifolia L. Sp. PL 638. 1753. 



The hoary under sides of. the leaves, and the blue flowers, 

 make this a showy species. It is plentiful on the "barking 

 sands" of Mana, Kauai. The main stems, which are decum- 

 bent and quite long, spread out over the sand, sending up 

 branches at intervals of a half foot or less. Horace Mann, 

 Proc. Am. Acad. 7: 194, calls this "Virtex trifolia, Linn., var.? 

 unifoliolata," and Hillebrand has it "var. unifoliata," with no 

 indication that he is not the author of the varietal name. 

 However, it is a nomen nudum, as Mann does not describe it, 

 aod if it were distinct, would probably have to be called Vitex 

 ovata THUNB. My specimens show leaves varying from 



