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364 pp. Bethlehem, Pa., 1887. HFr-W 864 

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47 pp. 112 pis. with descr. text, Bethlehem, 1890. 



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 61 pp. 5 pis. Berlin, 1900. 



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197 pp. 10 pis. Berlin, 1877. EH-W 864 



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 322 pp. New York, 1868. BA-W 874 

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 346 pp. New York, [1888.] BA-W 874 



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 220 pp. New York, 1889. BA-W 874 



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Fourteen weeks in botany. 



318 pp. New York, 1879. BA-W 874 

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