The papillæ of the stigma of saffron (Plate 115, Fig. 3) are long and tubular. These papillæ are nearly uniform in diameter, and the apex is blunt and rounded. The wall is slightly granular in appearance. The papillæ of the stigma of American saffron (Plate 116, Fig. 2) are short and tubular. Each papilla is broadest at the base and tapers to a slender point. The papillæ of that part of the style which emerges from the corolla (Plate 116, Fig. 1) are large and curved, and the walls are very thick. The apex of the papilla is frequently solid. The papillæ of the stigma of the ray flowers of anthemis (Plate 117, Fig. 1) have thin, slightly striated walls; while the papillæ of the stigma of the disk flowers (Plate 117, Fig. 2) are longer, the walls are thicker, and the cell content is denser. [Illustration: PLATE 115 PAPILLÆ 1. Arnica ray flowers (_Arnica montana_, L.). 2. Insect flower disk (_Chrysanthemum cinerariifolium_ [Trev.], Vis.). 3. True saffron (_Crocus sativus_, L.).] [Illustration: PLATE 116 PAPILLÆ OF STIGMAS 1. Stigma papillæ of American saffron (_Carthamus tinctorius_, L.) from that part of the style that emerges from the corolla. 2. Papillæ from the upper part of the stigma of American saffron. 3. Papillæ of the stigma of the disk flowers of arnica (_Arnica montana_, L.).] [Illustration: PLATE 117 PAPILLÆ OF STIGMAS 1. Stigma papillæ of the ligulate flowers of anthemis (_Anthemis nobilis_, L.). 2. Stigma papillæ of the tubular flowers of anthemis. 3. Stigma papillæ of the ligulate flowers of matricaria (_Matricaria chamomilla_, L.). 4. Stigma papillæ of the disk flowers of matricaria. 5. Stigma papillæ of the ligulate flowers of insect flower (_Chrysanthemum cinerariifolium_ [Trev.], Vis.).] The papillæ of the stigma of the ray (Plate 117, Fig. 3) and disk flowers (Plate 117, Fig. 5) of matricaria are similar in structure, but the papillæ of the disk flowers are larger. The papillæ of the stigma of the ligulate flowers of insect flowers (Plate 117, Fig. 5) are tubular; the walls are striated, and in each papilla there is a small yellow globule, while the papillæ of the disk flowers (Plate 115, Fig. 2) are long and tubular, and the walls are thick. The papillæ of the stigma of the ray flowers of arnica (Plate 115, Fig. 1) are very short and tubular. The walls are thin and the cell contents appear as small, bright-yellow globules, while the papillæ of the stigma of the disk flowers (Plate 116, Fig. 3) are broadest at the base, the apex is pointed, and the yellow globules are larger. The =solitary= hairs are divided into the branched and non-branched hairs. POWDERED INSECT FLOWERS