No. 4, February, 1922] TAXONOMY, VASC. PLANTS 313 



including the knoA\'n naturalized species, and attempts to group the species in an evolutionary 

 sequence. After discussing the critical characters in each of the genera and subgenera, and 

 the age and distribution of various species, he gives a key to the genera and subgenera. The 

 bibliography, synonymy, distribution, and discription of each of the species follows the key. 

 The article is to be continued, this installment covering the genus Veronicastrum and the 

 subgenus Veronicclla of the genus Veronica. The species here treated are: Veronicastrum 

 virginicum (L.) Farwell, Veronica maritima L., V. sjncata L., V. mexicana S. Wats., V. 

 Copelandii Eastw., V. Citsickii A. Gray, V . frxiticans Jacq., V. alpina L., V. Stelleri Willd., 

 1'. Wormskjoldii Roem. & Schult., V. Wormskjoldii nutans (Bong.) Pennell comb, nov., 

 V. serpyllifolia L., T'. serpyllifolia humifusa (Dickson) Vahl., V. peregrina L., V. peregrina 

 xalapensis (HBK.) Pennell, V. arvensis L., V. agrestis L., V. polita Fries, V. persica Poir., 

 V. biloba L., V. hederaefolia L. A key to the latter group is given. — James P. Poole. 



2031. Pennell, Francis W, "Veronica" in North and South America, llhodora 23: 

 20-41. 1921. — This, the concluding portion of the revision of the species of "Veronica," 

 covers the species of the subgenus Euveronica, as follows: V . latifolia L., V. Charnaedrys L., 

 V. javanicaBluxne, V. gra7idiJlora J. Gaertn., V. officinalis h., V. Beccabungah., V.aineri- 

 cana Schwein., V. Anagallis-aquatica L., V. Anagallis-aquatica Brittonii (Porter) Pennell 

 comb, nov., V . glandifera Pennell, V. catenata Pennell sp. nov., V. catenata glandulosa (Far- 

 well) Pennell comb, nov., V. undulata Wall., V. scutellata L, The article also covers the 

 genus Hebe, with the following species: H. salicifolia (Forst.) Pennell comb, nov., H. blanda 

 (Cheesm.) Pennell comb, nov., H. elliptica (Forst.) Pennell comb. nov. The article closes 

 with a list of Nomina Excludenda. — James P. Poole. 



2032. Petrie, D. Descriptions of new native flowering-plants. Trans, and Proc. New 

 Zealand Inst. 52: 17-19. 1920. — The following new species, varieties, and combinations are 

 made: Pittosporum Matthewsii, Uncinia longifructus (Kiik.), Uncinia caespitosa Col. var. 

 collina, Carex secta Boott var. tenuiculmis, Poa novae-zelandiae Hackel var. Wallii. — Wm. 

 Randolph Taylor. 



2033. Pfeiffer, Hans. Uber die Stellung der Gattung Caustis R. Br. im natiirlichen 

 System. II. [On the position of the genus Caustis in the natural system.] Ber. Deutsch. Bot. 

 Ges. 38: 207-216. Fig. 1. 1920. — Having, in an earlier paper, given the grounds for including 

 the genus Caustis in the Cyperaceae, the author in this paper deals with the position of the 

 genus in the family. He concerns himself with 3 questions: Does Caustis belong to the tribe 

 Gahnieae? Is this tribe to be retained unchanged or is it to be extended to include several 

 other genera of the Rhynchosporeae? If the latter is the case, to what grouping of genera 

 would its extended position most nearly correspond? Each of these questions is discussed 

 at length. A very complete key to the genera is given, based mainly on the bristles of the 

 spikelet and the fruit. The subfamily includes the tribes Schoeneae, Rhynchosporeae, and 

 Cladieae; the genus Caustis is placed in the last mentioned tribe. — P. B. Kennedy. 



2034. Pittier, Henry. Notes on the genus Swartzia in Panama and Guatemala. Jour. 

 Washington [D. C.] Acad. Sci. 11: 155-160. 1921. — The genus is revised and the following 

 species are described; Swartzia panamensis Benth., S. simplex Spreng., S. arborescens (Aubl.) 

 Pittier, S. trifolia sp. nov., S. myrtifolia J. E. Sm., S. darienensis sp. nov., S. guatemalensis 

 (Donn. Sm.) Pittier. — Helen M. Gilkey. 



2035. Pittier, Henry. Two new species of Bursera. Jour. Washington [D, C.] Acad. 

 Sci. 11: 229-230. 1921. — Both species, Bursera panamensis and B. verapacencis, are from 

 Central America. — Helen M. Gilkey. 



2036. Pole Evans, I. B. The Flowering Plants of South Africa. 1: PI. 21-40. 1921.— 

 The number contains colored plates of Pachypodium succulentum, Protea abyssinica, Bolus- 

 anthus speciosus, Acokanthera spectabilis, Cyrtanthus sanguineus, C. McKenii, C. obliquus, 

 C. rotundifolius sp. nov., Stapelia Gettleffii, Streptocarpus Dumii, Senecio stapeliaeformis 

 sp. nov., Nymphaea stellata, Ceropegia Meyeri, C. Rendallii, Moraea iridioides, Haemanthvs 



