ADDENDA. 681 



style persistent. This species is from 6' to 15' high, light yellowish-brown, 

 with some bluish-purple in the flowers, these in a loose spike from .3' to 9' long. 

 (Adv. from Eu.) 



To page 410. 



3. ATRIPLEX R6SEA, L. More hoary-mealy than A. patula ; leaves short- 

 petioled or the upper sessile, rhombic-ovate or oblong with a wedge-shaped base, 

 coarsely sinuate-toothed ; fertile flowers mostly clustered in the axils ; fruiting 

 bracts broad, cut-toothed and warty, united to the middle. Albany, New York, 

 in streets and waste places, Sept., C. H. Peck, G. W. Clinton. (Adv. from Eu.) 



To page 452. 



5. Quercus prinoides, Willd. (Q. Prinus, var. humilis, Marsh.), the 

 DWARF CHESTNUT or CHINQUAPIN-OAK, is probably a quite distinct species. 

 As noted by Mr. Emerson in Trees of Mass., some of the scales of the cup are 

 apt to produce abortive little acorns in their axils. 



To page 479. 



3*. Lemna paucicostata, Hegelmaier, in litt. " Fronds obliquely ob- 

 ovate (!"- l" long), thin, mostly grouped 3-5 together; fruit and style as in 

 L. perpusilla ; seed marked with 12 - 14 prominent (instead of 30 - 40 delicate) 

 ribs, between them (in both species) transversely striate. Ponds, about St. Louis 

 and southward into the tropics .: frequently fertile, Aug. - Oct." Engelmann. 



To page 483. 



3. Naias Indica, var. gracillima, Braun, Mss. " Branches alternate ; 

 leaves very narrowly linear, nearly capillary, straight, serrate (with 20-40 teeth 

 consisting of 3 cells each), the rounded lobes of the sheathing base spinulose- 

 ciliate ; fruit linear, brown, impressed-dotted between the numerous (about 24) 

 ribs. In ponds, Albany, New York, C. H. Peck, Woburn, Massachusetts, 

 Wm. Boott, 1867, Missouri, Engelmann. N. minor, not yet found in America, 

 is dichotomous, with recurved leaves, few and stout spikes, and seeds trans- 

 versely reticulated. N. flexilis has the leaves minutely serrate with teeth of 

 single cells, their abrupt and rounded sheathing base toothed, the yellowish- 

 brown seeds lance-oval, smooth and shining, &c." Engelmann. 



To page 491. 



3. TriglOGhin triandrum, Michx. Scape and leaves slender (6' - 12' 

 high) ; flowers very small, with only 3 sepals and 3 stamens (instead of 6 as in 

 the others) ; fruit globose- triangular, or when dry 3-lobed. Sea-shore of Mary- 

 land and Virginia, W. M. Canby, and southward. Aug. - Oct. 



To page 499. 



2. Habenaria nivea, Spreng. Stem slender, l-lj high, many- 

 leaved, the 1 or 2 lower leaves lance-linear and 4' -8' long, the others small and 

 bract-like ; spike cylindrical, loosely many-flowered ; flowers white, small ; pet- 

 als and entire lip linear-oblong ; spur thread-shaped, ascending, as long as the 

 white ovary. Pine-barren swamps, S. Delaware, W. M. Canby, and south- 

 ward. Aug. Ovary not twisted : spur therefore looking towards the axis. 



