Floristik u. Systematik der Phanerogamen. — Agricultur etc. 415 



Contains the following new naines : H. prionophilum, H. carneum 

 Chihuahuense, H. prionobium, H. Rosei, H. Wrightü (H. Rusbyi Wrightü 

 Gray), H. Oaxacanum, H. joliscense, and H. joliscense Ghiesbreghtii. 



Trelease. 



Seemen, 0. VON, Das von H. Pittier und Ad. Tonduz in 



Costa -Rica gesammelte Quercus - Mater ial. (Bull. 



Herb. Boiss. Ser. II. T. IV. 1904. p. 651—656.) 



Determinations des Quercus du Costa Rica distribues par M. M. 

 Pittier et Tonduz et diagnoses, en langue allemande, de deux especes 

 nouvelles: Quercus PUgeriana et Q. Tonduzii. A. de Candolle. 



SOLEREDER, H., Zur näheren Kenntniss von Polycarpaea 



flllfolia Webb. et Christ und anderen can arischen 



Polycarpaea- Arten. (Bull. Herb. Boiss. Ser. II. T. IV. 



1904. p. 435—442. 



L'auteur s'est livre a une etude morphologique et anatomique appro- 

 fondie de plusieurs especes du genre Polycarpaea, et notamment du 

 P. filifolla dont il donne une description latine detaillee. 



A. de Candolle. 



Burrt-Davy, J., Botanical Notes. (Transvaal Agricultural 

 Journal. Vol. II. p. 278—313.) 



1. Native Economic Plant s. Two plants are known locally 

 under the name Vaal-Bosch. Terminalia sericea, a shrub or small 

 tree, yielding an oily wood suitable for posts and for firewood, and 

 Tarchonaiithus camp hör atus, a shrub which is a valuable source of 

 fodder in the vvinter and early spring when grass is scarce. 



2. Forage Plants. Alialfa or lucerne (Medicago sativa) is stated 

 to have given excellent results on experimental plots and to have with- 

 stood seven droughts without irrigation. 



Panicum laevifolium, a close relation oi Guinea grass (P. Maxi- 

 mum), is reported to oeeur in the Transvaal and tobe liked by cattle. 



Paspalum dilatatum, known as iarge water grass or Breedzaad, 

 is naturalized in parts of the Transvaal and shows remarkable re- 

 sistance to drought. 



3. Commercial Botany. Notes of interesting plants in other 

 countries. 



4. Poisonous Plants. The effects of cattle eating Horse tail or 

 Dronk grass (Equisetum ramosissimum) are described. Other plants 

 mentioned as being more or less poisonous to cattle are Klappers or 

 stief-ziekte plant (Crotalaria burkeana), Mexican tobaeco or wilde 

 tabak (Nicotiana glauca), Solanum nigrum, S. pseudocapsicum, and the 

 unripe berries and tubers of S". tuberosum. 



5 Troublesome Weeds of Farm and Garden. The spread 

 of the Prickly Fear (Opuntia Tuna) in the bush is reported, and directions 

 given for its eradication. The hooked fruits of grapple plant (Harpago- 

 phytum procumbens) are stated to cause much annoyance to stock, and 

 sheep sorrel (Rumex acetosella) is reported as a troublesome weed in 

 some districts. 



Sfriga coccinea (Witch weed) a root parasite of the Scrophularia- 

 ceae does considerable damage to Indian com. 



Chaetochloa vertlcillata (Brisky fox tail) is troublesome owing to 

 its barbed bristles, and Eleuslne indica (goose grass) causes trouble in 

 eultivated ground, lawns, paths etc. The well known burr-weed (Xan- 

 thium spinosum) is spreading with dangerous rapidity in the Trans- 

 vaal and is a serious menace to the farming and stock raising in- 

 dustries. Stringent laws make the eradication of this pest compulsory. 



