46 MISC. PUBLICATION 797, U. S. DEPT. OF AGRICULTURE 
List of the 47 botanical districts recognized, with names of local in- 
vestigators and citation of published and unpublished local floras.—See also 
Ostenfeld, below. 
Frederiksen, Henry. Botanik for landmend. 2. opl. 255 p. 189 fig., 16 
col. pl. (on 8). 20.5 cm. Kgobenhavn, 1948. (ist ed. 1946.) 
Includes briefly descriptive semipopular account of cultivated useful 
plants, fodder plants, weeds (grouped by color), and useful native plants, 
annotated lists of poisonous plants and bee plants, ete.—See also (for useful 
or poisonous plants) Gronlund, Heger, Hornemann, Jacobsen, Lind, and H. 
Petersen, below; and (for weeds) Frederiksen and Petersen, Hansen, Jessen 
and Lind, and Lange (Oversigt), below. 
Grontved, Peter, and Petersen, H. I. Ukrudt og ukrudtbekempelse. 
320 p. 113 ie. 118 fig. (incl. maps), 16 col. pl. (on 8). 22.5 cm. Kgben- 
havn, 1950. 
Includes (p. 18-105) descriptive account of weeds, alphabetically arranged 
by vernacular names, with methods of control; also key (p. 123-141; includes 
dicotyledons only) based on cotyledons and early leaves, with figures of 96 
species.—See also Frederiksen, above, and additional references there given. 
Gram, Kaj, and Jessen, Knud. Trzer og buske i vintertilstand. 99 p. 
incl. 12 pl. on 6. 33 fig. 21 em. Kebenhavn, 1945. 
Discussion of characters of twigs, buds, etc.; treatment of native and 
cultivated shrubs and trees in form of key based on winter characters; 
short bibliography. Intended as a second edition of their Nogle til at 
bestemme de i Danmark vildtvoksende og hyppigst forvildede, lovfzeeldende 
lovtreer og buske i vintertilstand. Bot. Tidsskr. 43: 484-500. illus. 1936.— 
See also B. Moller, Kier, O. G. Petersen, and Warming, below. 
and Jessen, Knud. Vilde planter i Norden. 
See Lagerberg under Scandinavia. 
Grenlund, Christian. Danske giftplanter. In Smaastykker ved udvalget 
for ee ae fremme 6: 305-358. 38 fig. 15 cm. 1874. (Reissued 
1887. 
Popular treatment of Danish poisonous plants (Not seen; annotation 
supplied by J. B. Hansen.)—See also Frederiksen, above, and additional 
references there given. 
Hagerup, Olaf, and Petersson, Vagn. Botanisk atlas. Danmarks 
dekfroede planter. 550 p. incl. [515] pl. 29 cm. Kgbenhavn, 1956. 
Habit figures, often with details (in some cases the details only), of 
essentially all native (and some adventive) angiosperms except the micro- 
species; no text except for some family or specific descriptions. A supplement 
containing gymnosperms, vascular cryptogams, and genera of mosses is in 
preparation. 
Hansen, Kristian. Markens vigtigste ukrudtsplanter samt nogle angreb 
af snyltesvampe og skadedyr paa markens afgreder. 3. gjennemsete oplag. 
41 p. 20.5 em. Kongens Lyngby, 1906. (1st ed. 1903.) 
List of most important weeds, with brief statement of manner of spreading, 
methods of control, etc.; also a few fungi and insects. The 4. ed. (1909) 
does not have scientific names.—See also Frederiksen, above, and additional 
references there given. 
[Heger, J. S.] Afbildinger af danske oeconomiske planter, med beskri- 
velser over deres egenskaber og anvendelse ... 3 v. (288 p.). 288 col. 
pl. 20 cm. Kjobenhavn, 1826-35. 
Account of useful and medicinal plants, with descriptions and uses. (Not 
seen; annotation supplied by J. B. Hansen.)—See also Frederiksen, above, 
and additional references there. 
Hornemann, J. W. Forsgg til en dansk oeconomisk plantelere. 3., 
forggede oplag. 2 v. (xii, 1042 p.; 2 pl., 990 p.). 2 pl. 20 cm. Kjgben- 
havn, 1821-37. (Gray Herbarium library.) (1st ed. 1806.) 
Descriptive flora of vascular and cellular plants on the Linnaean system, 
with vernacular names in various Scandinavian languages, and uses. Title | 
of vol. 2 reads: Dansk oeconomisk plantelere.—See also Frederiksen, above, 
and additional references there given. 
Hvass, Hans. Flora i farver. 
See Bolin under Scandinavia. 
