Campanula scabrella Eengelmann (Campanulaceae) von Heckard L.R

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Chromosome numbers of neotropical Castilleja (Scrophulariaceae: tribe Pediculareae) and their taxonomic implications von Chuang, T.I, Heckard, L.R

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A taxonomic revision of Orthocarpus (Scrophulariaceae: tribe Pediculareae) von Chuang, T.I. (Illinois State University, Normal, IL), Heckard, L.R

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New species of bee-pollinated Castilleja from Peru, with a taxonomic revision of South American members of subg. Colacus von Chuang, T.I. (Illinois State University, Normal, IL), Heckard, L.R

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Genetic realignment and synopsis of subtribe Castillejinae (Scrophulariaceae: tribe Pediculareae) von Chuang, T.I. (Illinois State University, Normal, IL), Heckard, L.R

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Systematic significance of seed-surface features in Orthocarpus (Scrophulariaceae-subtribe Castillejinae) von Chuang, T.I, Heckard, L.R

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Mimulus shevockii (Scrophulariaceae), a new species from desert habitats in southern Sierra Nevada of California von Heckard, L.R, Bacigalupi, R

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Status and distribution of Castilleja mollis (Scrophulariaceae) von Heckard, L.R. (University of California, Berkeley, CA), Ingram, S.W, Chuang, T.I

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Mimulus norrisii (Scrophulariaceae), a new species from the southern Sierra Nevada von Heckard, L.R, Shevock, J.R

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Taxonomy and distribution of Orobanche valida (Orobanchaceae) [New taxa] von Heckard, L.R, Collins, L.T

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Chromosome numbers of Orthocarpus and related monotypic genera (Scrophulariaceae: subtribe Castillejinae) von Chuang, Tsan Iang, Heckard, Lawrence R.

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Orthocarpus luteus Nutt

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Cordylanthus ramosus Nutt. ex Benth

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Cordylanthus maritimus Nutt. ex Benth. subsp. maritimus

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Cordylanthus ramosus Nutt. ex Benth

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Orthocarpus bracteosus Benth

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Morphology, evolution, and taxonomic significance of the inflorescence in Cordylanthus (Scrophulariaceae) von Chuang, T.I, Heckard, L.R

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Origin and taxonomy of Castilleja montigena (Scrophulariaceae) von Heckard, L. R., Morris, M. I., Chuang, T. I.

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Chromosome numbers, polyploidy, and hybridization in Castilleja (Scrophulariaceae) of the Great Basin and Rocky Mountains [USA] von Heckard, Lawrence R., Chuang, Tsan-Iang

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Chromosome numbers and polyploidy in Orobanche (Orobanchaceae) von Heckard, L. R., Chuang, T. I.

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