230 AMERICAN MIDLAND NATURALIST 
No. 1906 collected with the terrestrial No. 1901 at Millers, Ind., 
in the same pool July 9, 1911. Numbers 1904 and 1905 are sterile 
aquatic shoots gathered nearby. They are more typically aquatic 
in nature of the foliage, as No. 1905 has traces of pubescence 
on leaves just forming that connect it without doubt with the 
terrestrial phases of P. tanaophylla as just described. I choose 
No. 1906 in preference to the more typically aquatic 1904 and 1905, 
because the latter are sterile. The choice, however, is arbitrary, 
for my experience shows that the aquatics are normally or at 
least commonly sterile. 
Subsection II. HARTWRIGHTIANAE. 
Plants having more or less spreading herbaceous borders 
to the ochreae usually in the terrestrial phase, sometimes only in 
the terrestrial spring sterile and disappearing later. 
Persicaria carictorum Nwd. nov. sp. 
PLANTA TERRESTRIS VERNA circiter 6 dm. alta. Forma foliorum 
maxime differt ab ea foliorum plantae aquaticae. Folia 9-19.5 
em. longa 2-5 dm. lata cum petiolis 1 cm. longis, densis pilis et 
sericeis mollibus plus minusve divaricatis induta, praesertim 
juvenilia; pilis in venis et petiolis praesertim divaricati. Ochreae 
dense sericeo-hirsutis pilis obsitae, et in infundibuliformem vel 
campanulatum marginem herbaceum ciliatum terminantes. Folia 
anguste lanceolata cum baso rotundato vel obtuso et apice longe 
acuminato in fine obtusiusculo. In plantis caulem inferiorem 
adhuc aquaticum habentibus, folia superioris partis terrestria, 
semper dimidio angustiora et longiora sunt! 
PLANTA TERRESTRIS AUTUMNALIS unica fertilis, ae minusve 
erecta 3—-8.5 dm. alta, assurgens e rhizomate in humidis vel aridis 
locis radicante. Internodi 3—7.5 em. longi: nodi haud intumescunt. 
Folia inflorescentiam superantia 7.5-17 cm. longa, 2-4 cm. lata, 
pubescentia ut in planta terrestri sterili. Ochreae molliter sericeo- 
hirsutae pilis plus minusve divaricatis et omnino et semper margines 
divaricatos carentes. Folia juniora pilis sericeis appressis canes- 
centia. Spicae 1-3 saepissime 2, altera prior et senior, circa 5 
cm. altera junior 2 cm. longa. (Quando 3 adsunt, omnes fere 
aeque longae circa 2.5 cm.) Pedunculi 3-4 cm. longi, tenues, et 
glandulosis pilis divaricatis induti. Bracteae ovato-triangulari- ~ 
