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"Suppose a to be a stationary celestial object, then as the Earth makes her annual revolution around the Sun S, this object at one time will appear among the stars at e, but six months after, when the Earth comes to the opposite point in her orbit, the same object will be seen at c, the space from c to e being the annual parallax of the object a. But the distances of the stars are so great that the diameter of the Earth's orbit, or 190,000,000 of miles make no difference in their apparent places. Were the fixed stars within 19 trillions of miles, their distance could be told by their parallaxes." —Comstock, 1850

Annual Parallax

"Suppose a to be a stationary celestial object, then as the Earth makes her annual revolution around…

Safflower (Carthamus tinctorius L.) is a highly branched, herbaceous, thistle-like annual, usually with many long sharp spines on the leaves. Plants are 30 to 150 cm tall with globular flower heads (capitula) and commonly, brilliant yellow, orange or red flowers which bloom in July. Each branch will usually have from one to five flower heads containing 15 to 20 seeds per head. Safflower has a strong taproot which enables it to thrive in dry climates, but the plant is very susceptible to frost injury from stem elongation to maturity.

Safflower

Safflower (Carthamus tinctorius L.) is a highly branched, herbaceous, thistle-like annual, usually with…

<i>Salsola kali</i>. This plant is also called a Russian Thistle, Prickly Glasswort, Tumbleweed, and Glasswort. It is a member of the amaranth family and is an annually growing herb. It has a bushy stem with many branches. It produces a small, white flower. It is native on sea beaches in Europe, western Asia, North and South America, and Australia.

Prickly Saltwort

Salsola kali. This plant is also called a Russian Thistle, Prickly Glasswort, Tumbleweed, and Glasswort.…

<i>Sium sisarum</i>. "A species of water parsnip, generally said to be of Chinese origin, long cultivated in Europe for its esculent root. It is a plant a foot high with pinnate leaves, a hardy perennial, but grown as an annual. The root is composed of small fleshy tubers, of the size of the little finger, united at the crown." &mdash;Whitney, 1889

Skirret

Sium sisarum. "A species of water parsnip, generally said to be of Chinese origin, long cultivated in…