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They used DNA to correctly identify both snails, Galba cubensis and Galba humilis, and the flatworm.

Certain tulips are reliably perennial, including varieties of clusiana, fosteriana, greigii, kaufmanniana and humilis.

In habit like var. humilis; spikes tawny; perigynium like that of C. triceps, var. hirsuta; plant smooth, or very minutely pubescent under a strong lens.—Philipstown,

“Sanctitatis V. humilis filius et addictissimus servus, “Cornelius Laonensis Episcopus”.

Other distinct kinds are P. campanulatus, 1� ft., pale rose, of bushy habit; P. humilis, 9 in., bright blue; P. speciosus, cyananthus and Jaffrayanus, 2 to 3 ft., all bright blue; P. barbatus, 3 to 4 ft., scarlet, in long terminal panicles; P. Murrayanus, 6 ft., with scarlet flowers and connate leaves; and P. Palmeri, 3 to 4 ft., with large, wide-tubed, rose-coloured flowers.