References - Botanical Research Institute of Texas

1502 LITERATURE CITED/PINKAVA
PINKAVA, D.J. 1967. Biosystematic study of Berlandiera
(Compositae). Brittonia 19:285–298.
PIPER,C.V.1906. North American species of Festuca. Contr. U.S.
Natl. Herb. 10:1–48.
_____ and K.S.BORT.1915.The early agricultural history of timothy.
J. Amer. Soc. Agron. 7:1–14.
PIPPEN,R.W.1978. Cacalia.N.Amer. Fl. II. 10:151–159.
PLATT,S.G.and C.G. BRANTLEY. 1997. Canebrakes: An ecological
and historical perspective. Castanea 62:8–21
PLUNKETT, G.M., D.E. SOLTIS, and P.S. SOLTIS. 1996 [1997].
Evolutionary patterns in Apiaceae: Inferences based on
matK sequence data. Syst. Bot. 21:477–495.
POGAN,E.1963. Taxonomical value of Alisma trivale Pursh and
Alisma subcordatum Raf. Canad. J. Bot. 41:1011-1013.
POHL,R.W.1951.The genus Setaria in Iowa.Iowa State Coll.J.Sci.
25:501–508.
_____. 1959. Morphology and cytology of some hybrids
between Elymus canadensis and E. virginicus. Proc.Iowa
Acad. Sci. 66:155–159.
_____. 1962. Notes of Setaria viridis and S. faberi (Gramineae).
Brittonia 14:210–213.
_____. 1969. Muhlenbergia,subgenus Muhlenbergia (Gramineae)
in North America. Amer. Midl. Naturalist 82:512–542.
POLHILL,R.M.and P.H. RAVEN, eds. 1981. Advances in legume systematics.
Vols. 1, 2. Proc. Intern. Legume Conference, Kew,
England, U.K.
POOL,W.C. 1964. Bosque territory:A history of an agrarian community.
Chaparral Press, Kyle,Texas.
POOLE,M.M.and D.R. HUNT. 1980. Pollen morphology and the
taxonomy of the Commelinaceae: An exploratory survey.
American Commelinaceae:VIII. Kew Bull. 34:639–660.
PORTER,C.L.1967. Taxonomy of flowering plants, 2nd ed. W.H.
Freeman and Co., San Francisco, CA.
PORTER, D.M.1969. The genus Kallstroemia (Zygophyllaceae).
Contr. Gray Herb. 198:41–153.
_____. 1972. The genera of Zygophyllaceae in the southeastern
United States. J. Arnold Arbor. 53:531–552.
_____. 1974. Disjunct distributions in the New World
Zygophyllaceae.Taxon 23:339–346.
_____. 1976. Zanthoxylum (Rutaceae) in North America north
of Mexico. Brittonia 28:443–447.
POWELL, A.M.1973. Taxonomy of Perityle section Laphamia
(Compositae-Helenieae-Peritylinae). Sida 5:61–128.
_____. 1988. Trees and shrubs of Trans-Pecos Texas including Big
Bend and Guadalupe Mountains National Parks. Big Bend
Natural History Association, Inc., Big Bend National Park,TX.
_____. 1994. Grasses of the Trans-Pecos and adjacent areas.
Univ. of Texas Press, Austin.
_____. 1998.Trees and shrubs of the Trans-Pecos and adjacent
areas. Univ. of Texas Press, Austin.
PRICE, R.A.1989. The genera of Pinaceae in the southeastern
United States. J. Arnold Arbor. 70:247–305.
_____. 1996.Systematics of the Gnetales:A review of morphological
and molecular evidence. In: W.E. Friedman (symposium
organizer). Biology and evolution of the Gnetales. Int. J. Pl.
Sci. 157 (Nov. 1966 suppl.):S40–S49.
_____ and J.M. LOWENSTEIN. 1989. An immunological comparison
of the Sciadopityaceae, Taxodiaceae, and Cupressaceae.
Syst. Bot. 14:141–149.
PRICE,R.A.and J.D. PALMER. 1993. Phylogenetic relationships of
the Geraniaceae and Geraniales from rbcL sequence comparisons.
Ann. Missouri Bot. Gard. 80:661–671.
PRINGLE, J.S.(JAMES). Personal communication. Specialist in
Gentianaceae and botanical history. Royal Botanical
Gardens, Hamilton, Ontario, Canada.
PRINGLE,J.S.1997. Clematis. In: Flora of North America Editorial
Committee,eds.Fl.North Amer.3:158–159,164–176.Oxford
Univ. Press, New York and Oxford.
PROCHER, R.D.1978. Boerhaavia diffusa L. (B. coccinea Mill.)
(Nyctaginaceae) in the Carolinas. Castanea 43:172–174.
PROCTOR, M.,P.YEO, and A. LACK. 1996. The natural history of
pollination, Timber Press, Portland, OR.
PRUSKI, J.F.and G.L. NESOM. 1992. Glandularia × hybrida
(Verbenaceae), a new combination for a common horticultural
plant. Brittonia 44:494–496.
PUFF, C. 1976. The Galium trifidum group (Galium sect.
Aparinoides,Rubiaceae). Canad. J. Bot. 54:1911–1925.
_____. 1977. The Galium obtusum group (Galium sect.
Aparinoides,Rubiaceae). Bull.Torrey Bot. Club 104:202–208.
PULICH,W.M. 1988.The birds of North Central Texas.Texas A&M
Univ. Press, College Station.
PUNT,W. 1962. Pollen morphology of the Euphorbiaceae with
special reference to taxonomy.Wentia 7:1–116.
PYRAH, G.L.1969. Taxonomic and distributional studies in
Leersia (Gramineae). Iowa State J. Sci. 44:215–270.
QIU,Y-L., M.W. CHASE,D.L.LES, and C.R. PARKS. 1993. Molecular
phylogenetics of the Magnoliidae: Cladistic analyses of
nucleotide sequences of the plastid gene rbcL. Ann.
Missouri Bot. Gard. 80:587–606.
QUAYLE,J.(JEFF). Personal communication. Plant collector and
naturalist of Fort Worth who has contributed numerous
North Central Texas county records to the Botanical
Research Institute of Texas, Fort Worth.
QUIBELL, C.F.1993. Philadelphaceae. In: J.C. Hickman, ed. The
Jepson manual: Higher plants of California. Pp. 816–818.
Univ. of California Press, Berkeley.
RABE, E.W.and M.W. WINDHAM. 1993. Cheilanthes. In: Flora of
North America Editorial Committee, eds. Fl. North Amer.
2:152–169. Oxford Univ. Press, New York and Oxford.
RABELER,R.K.(RICHARD). Personal communication. Specialist in
Caryophyllaceae,especially introduced species;Collections
Manager at Univ. of Michigan Herbarium, Ann Arbor.
RABELER, R.K.1985. Petrorhagia (Caryophyllaceae) of North
America. Sida 11:6–44.
_____. 1988. Eurasian introductions to the Michigan flora. IV.
Two additional species of Caryophyllaceae in Michigan.
Michigan Bot. 27:85–88.
_____. 1992. A new combination in Minuartia (Caryophyllaceae).
Sida 15:95–96.
_____ and A.A. REZNICEK.1997. Cerastium pumilum and Stellaria
pallida (Caryophyllaceae) new to Texas. Sida 17:843–845.
RABELER, R.K.and J.W. THIERET. 1988. Comments on the Caryo-